Re: IBM HDAPS things are looking up (was: Re: [Hdaps-devel] Re: [ltp] IBM HDAPS Someone interested? (Accelerometer))
It should be noted im using linux-2.6.git. --- Jens Axboe <[EMAIL PROTECTED]> wrote: > On Fri, Jul 08 2005, Jon Escombe wrote: > > Jens Axboe wrote: > > > > >On Thu, Jul 07 2005, Shawn Starr wrote: > > > > > > > > >>Model: HTS548080M9AT00 (Hitachi) > > >>Laptop: T42. > > >> > > >>segfault:/home/spstarr# ./a /dev/hda > > >>head parked > > >> > > >>Seems to park, heard it click :) > > >> > > >> > > > > > >Note on that - if the util says it parked, you > can be very sure that it > > >actually did as the drive actually returns that > status outside of just > > >completing the command. > > > > > > > > It's worth noting that you'll need the libata > passthrough patch to make > > this work on a T43.. > > > > However, with this patch I'm getting the "head not > parked 4c" message, > > but I can hear the click from the drive.. It takes > around 350-400ms for > > the command to execute, but when repeated, it > drops to around 5ms for a > > short while (with no audible clicking), before > reverting to original > > behaviour after a few seconds. > > > > The clicking and the variation in execution time > lead me to think it is > > parking, but not being reported correctly? > > Sounds like a pass through bug, it should pass the > register output back > out again for a non-data command. > > Checking code... Yeah it does not. Since the 'we > parked successfully' is > stored in the lbal register, we need the full > register set copied back > into the buffer. That goes for all three HDIO_* > commands, there's still > some work to be done for the libata passthrough to > be compliant with the > ide one. > > -- > Jens Axboe > > > > --- > This SF.Net email is sponsored by the 'Do More With > Dual!' webinar happening > July 14 at 8am PDT/11am EDT. We invite you to > explore the latest in dual > core and dual graphics technology at this free one > hour event hosted by HP, > AMD, and NVIDIA. To register visit > http://www.hp.com/go/dualwebinar > ___ > Hdaps-devel mailing list > [EMAIL PROTECTED] > https://lists.sourceforge.net/lists/listinfo/hdaps-devel > - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
Re: IBM HDAPS things are looking up (was: Re: [Hdaps-devel] Re: [ltp] IBM HDAPS Someone interested? (Accelerometer))
On Fri, Jul 08, 2005 at 02:56:08AM +0200, Bodo Eggert wrote: > Clemens Koller <[EMAIL PROTECTED]> wrote: > > > Well, sure, it's not a notebook HDD, but maybe it's possible > > to give headpark a more generic way to get the heads parked? > > I remember my old MFM HDD, which had a Landing Zone stored in the BIOS to > which the park command would seek. Maybe you could do something similar > and park the head on the last cylinder if the other options fail. This is not really a good idea. It worked for the old drives, because you weren't supposed to move them around. The shock when the machine hits the ground will cause the head to move anyway and bounce across the whole surface. Real parking makes a click because the head is moved outside the surface and locked in that position. -- Vojtech Pavlik SuSE Labs, SuSE CR - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
Re: IBM HDAPS things are looking up (was: Re: [Hdaps-devel] Re: [ltp] IBM HDAPS Someone interested? (Accelerometer))
On Fri, Jul 08 2005, Jon Escombe wrote: > Jens Axboe wrote: > > >On Thu, Jul 07 2005, Shawn Starr wrote: > > > > > >>Model: HTS548080M9AT00 (Hitachi) > >>Laptop: T42. > >> > >>segfault:/home/spstarr# ./a /dev/hda > >>head parked > >> > >>Seems to park, heard it click :) > >> > >> > > > >Note on that - if the util says it parked, you can be very sure that it > >actually did as the drive actually returns that status outside of just > >completing the command. > > > > > It's worth noting that you'll need the libata passthrough patch to make > this work on a T43.. > > However, with this patch I'm getting the "head not parked 4c" message, > but I can hear the click from the drive.. It takes around 350-400ms for > the command to execute, but when repeated, it drops to around 5ms for a > short while (with no audible clicking), before reverting to original > behaviour after a few seconds. > > The clicking and the variation in execution time lead me to think it is > parking, but not being reported correctly? Sounds like a pass through bug, it should pass the register output back out again for a non-data command. Checking code... Yeah it does not. Since the 'we parked successfully' is stored in the lbal register, we need the full register set copied back into the buffer. That goes for all three HDIO_* commands, there's still some work to be done for the libata passthrough to be compliant with the ide one. -- Jens Axboe - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
Re: IBM HDAPS things are looking up (was: Re: [Hdaps-devel] Re: [ltp] IBM HDAPS Someone interested? (Accelerometer))
On Fri, Jul 08 2005, Bodo Eggert wrote: > Clemens Koller <[EMAIL PROTECTED]> wrote: > > > Well, sure, it's not a notebook HDD, but maybe it's possible > > to give headpark a more generic way to get the heads parked? > > I remember my old MFM HDD, which had a Landing Zone stored in the BIOS to > which the park command would seek. Maybe you could do something similar > and park the head on the last cylinder if the other options fail. Yeah, in ancient times you would simply issue a SEEK to the landing zone and the drive would park. Those days are long gone. The SEEK is just a hint anyways, with the sophisticated caching that drives do today I wouldn't rely on it doing anything reliable. -- Jens Axboe - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
Re: IBM HDAPS things are looking up (was: Re: [Hdaps-devel] Re: [ltp] IBM HDAPS Someone interested? (Accelerometer))
On Fri, Jul 08 2005, Bodo Eggert wrote: Clemens Koller [EMAIL PROTECTED] wrote: Well, sure, it's not a notebook HDD, but maybe it's possible to give headpark a more generic way to get the heads parked? I remember my old MFM HDD, which had a Landing Zone stored in the BIOS to which the park command would seek. Maybe you could do something similar and park the head on the last cylinder if the other options fail. Yeah, in ancient times you would simply issue a SEEK to the landing zone and the drive would park. Those days are long gone. The SEEK is just a hint anyways, with the sophisticated caching that drives do today I wouldn't rely on it doing anything reliable. -- Jens Axboe - To unsubscribe from this list: send the line unsubscribe linux-kernel in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
Re: IBM HDAPS things are looking up (was: Re: [Hdaps-devel] Re: [ltp] IBM HDAPS Someone interested? (Accelerometer))
On Fri, Jul 08 2005, Jon Escombe wrote: Jens Axboe wrote: On Thu, Jul 07 2005, Shawn Starr wrote: Model: HTS548080M9AT00 (Hitachi) Laptop: T42. segfault:/home/spstarr# ./a /dev/hda head parked Seems to park, heard it click :) Note on that - if the util says it parked, you can be very sure that it actually did as the drive actually returns that status outside of just completing the command. It's worth noting that you'll need the libata passthrough patch to make this work on a T43.. However, with this patch I'm getting the head not parked 4c message, but I can hear the click from the drive.. It takes around 350-400ms for the command to execute, but when repeated, it drops to around 5ms for a short while (with no audible clicking), before reverting to original behaviour after a few seconds. The clicking and the variation in execution time lead me to think it is parking, but not being reported correctly? Sounds like a pass through bug, it should pass the register output back out again for a non-data command. Checking code... Yeah it does not. Since the 'we parked successfully' is stored in the lbal register, we need the full register set copied back into the buffer. That goes for all three HDIO_* commands, there's still some work to be done for the libata passthrough to be compliant with the ide one. -- Jens Axboe - To unsubscribe from this list: send the line unsubscribe linux-kernel in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
Re: IBM HDAPS things are looking up (was: Re: [Hdaps-devel] Re: [ltp] IBM HDAPS Someone interested? (Accelerometer))
On Fri, Jul 08, 2005 at 02:56:08AM +0200, Bodo Eggert wrote: Clemens Koller [EMAIL PROTECTED] wrote: Well, sure, it's not a notebook HDD, but maybe it's possible to give headpark a more generic way to get the heads parked? I remember my old MFM HDD, which had a Landing Zone stored in the BIOS to which the park command would seek. Maybe you could do something similar and park the head on the last cylinder if the other options fail. This is not really a good idea. It worked for the old drives, because you weren't supposed to move them around. The shock when the machine hits the ground will cause the head to move anyway and bounce across the whole surface. Real parking makes a click because the head is moved outside the surface and locked in that position. -- Vojtech Pavlik SuSE Labs, SuSE CR - To unsubscribe from this list: send the line unsubscribe linux-kernel in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
Re: IBM HDAPS things are looking up (was: Re: [Hdaps-devel] Re: [ltp] IBM HDAPS Someone interested? (Accelerometer))
It should be noted im using linux-2.6.git. --- Jens Axboe [EMAIL PROTECTED] wrote: On Fri, Jul 08 2005, Jon Escombe wrote: Jens Axboe wrote: On Thu, Jul 07 2005, Shawn Starr wrote: Model: HTS548080M9AT00 (Hitachi) Laptop: T42. segfault:/home/spstarr# ./a /dev/hda head parked Seems to park, heard it click :) Note on that - if the util says it parked, you can be very sure that it actually did as the drive actually returns that status outside of just completing the command. It's worth noting that you'll need the libata passthrough patch to make this work on a T43.. However, with this patch I'm getting the head not parked 4c message, but I can hear the click from the drive.. It takes around 350-400ms for the command to execute, but when repeated, it drops to around 5ms for a short while (with no audible clicking), before reverting to original behaviour after a few seconds. The clicking and the variation in execution time lead me to think it is parking, but not being reported correctly? Sounds like a pass through bug, it should pass the register output back out again for a non-data command. Checking code... Yeah it does not. Since the 'we parked successfully' is stored in the lbal register, we need the full register set copied back into the buffer. That goes for all three HDIO_* commands, there's still some work to be done for the libata passthrough to be compliant with the ide one. -- Jens Axboe --- This SF.Net email is sponsored by the 'Do More With Dual!' webinar happening July 14 at 8am PDT/11am EDT. We invite you to explore the latest in dual core and dual graphics technology at this free one hour event hosted by HP, AMD, and NVIDIA. To register visit http://www.hp.com/go/dualwebinar ___ Hdaps-devel mailing list [EMAIL PROTECTED] https://lists.sourceforge.net/lists/listinfo/hdaps-devel - To unsubscribe from this list: send the line unsubscribe linux-kernel in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
Re: IBM HDAPS things are looking up (was: Re: [Hdaps-devel] Re: [ltp] IBM HDAPS Someone interested? (Accelerometer))
Clemens Koller <[EMAIL PROTECTED]> wrote: > Well, sure, it's not a notebook HDD, but maybe it's possible > to give headpark a more generic way to get the heads parked? I remember my old MFM HDD, which had a Landing Zone stored in the BIOS to which the park command would seek. Maybe you could do something similar and park the head on the last cylinder if the other options fail. -- Ich danke GMX dafür, die Verwendung meiner Adressen mittels per SPF verbreiteten Lügen zu sabotieren. - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
Re: IBM HDAPS things are looking up (was: Re: [Hdaps-devel] Re: [ltp] IBM HDAPS Someone interested? (Accelerometer))
Jon Escombe wrote: Jens Axboe wrote: Note on that - if the util says it parked, you can be very sure that it actually did as the drive actually returns that status outside of just completing the command. It's worth noting that you'll need the libata passthrough patch to make this work on a T43.. However, with this patch I'm getting the "head not parked 4c" message, but I can hear the click from the drive.. It takes around 350-400ms for the command to execute, but when repeated, it drops to around 5ms for a short while (with no audible clicking), before reverting to original behaviour after a few seconds. The clicking and the variation in execution time lead me to think it is parking, but not being reported correctly? Regards, Jon, Jon, Most likely it might be doing it but returning inmediately. If you are in a quiet place, you should be able to notice the change. You can test this by having 2 consoles. With one you run the command and with the other one, try going deep into the filesystem, you should notice that it takes awhile to find the files and folders. If it is fast, then is not parking. .Alejandro - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
Re: IBM HDAPS things are looking up (was: Re: [Hdaps-devel] Re: [ltp] IBM HDAPS Someone interested? (Accelerometer))
Jens Axboe wrote: On Thu, Jul 07 2005, Shawn Starr wrote: Model: HTS548080M9AT00 (Hitachi) Laptop: T42. segfault:/home/spstarr# ./a /dev/hda head parked Seems to park, heard it click :) Note on that - if the util says it parked, you can be very sure that it actually did as the drive actually returns that status outside of just completing the command. It's worth noting that you'll need the libata passthrough patch to make this work on a T43.. However, with this patch I'm getting the "head not parked 4c" message, but I can hear the click from the drive.. It takes around 350-400ms for the command to execute, but when repeated, it drops to around 5ms for a short while (with no audible clicking), before reverting to original behaviour after a few seconds. The clicking and the variation in execution time lead me to think it is parking, but not being reported correctly? Regards, Jon, __ Email via Mailtraq4Free from Enstar (www.mailtraqdirect.co.uk) - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
Re: IBM HDAPS things are looking up (was: Re: [Hdaps-devel] Re: [ltp] IBM HDAPS Someone interested? (Accelerometer))
On Thu, Jul 07 2005, Matthew Garrett wrote: > Jens Axboe <[EMAIL PROTECTED]> wrote: > > > What is needed is to flesh out what the kernel interface should looke > > like. I suggested a sysfs file for suspending and resuming access to the > > device, if people have other ideas they should voice them. > > That sounds quite reasonable. Does it need to do anything other than > park the head and suspend the command queue for that device? Not really, no. Someone mentioned a timeout for this as well, but I think that should just be done in user space. > (On an only slightly related note, for full ACPI support of PATA, we're > supposed to use the _GTF interface. This returns a set of taskfile > commands that are then supposed to be executed by the host. However, at > the point where we want to do this, the IDE queues haven't been > restarted. Is the best solution here just to add a trivial and stupid > IDE driver for managing the disks when we don't want userspace doing > anything with them?) Either that, or always allow non-fs commands to go through a frozen queue. Or flag those commands as ok for a frozen queue. The advantage of either of those approaches, is that we probably don't have to add any kernel support then and the generic block device freezing/unfreezing can be used. -- Jens Axboe - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
Re: IBM HDAPS things are looking up (was: Re: [Hdaps-devel] Re: [ltp] IBM HDAPS Someone interested? (Accelerometer))
Doesn't park here:
ehm:/home/folkert# ./park /dev/hda
head not parked 4c
ehm:/home/folkert# hdparm -i /dev/hda
/dev/hda:
Model=IC25N060ATMR04-0, FwRev=MO3OAD5A, SerialNo=MRG357K3KKN0XH
Config={ HardSect NotMFM HdSw>15uSec Fixed DTR>10Mbs }
RawCHS=16383/16/63, TrkSize=0, SectSize=0, ECCbytes=4
BuffType=DualPortCache, BuffSize=7884kB, MaxMultSect=16, MultSect=16
CurCHS=16383/16/63, CurSects=16514064, LBA=yes, LBAsects=117210240
IORDY=on/off, tPIO={min:240,w/IORDY:120}, tDMA={min:120,rec:120}
PIO modes: pio0 pio1 pio2 pio3 pio4
DMA modes: mdma0 mdma1 mdma2
UDMA modes: udma0 udma1 udma2 udma3 udma4 *udma5
AdvancedPM=yes: mode=0x80 (128) WriteCache=enabled
Drive conforms to: ATA/ATAPI-6 T13 1410D revision 3a:
* signifies the current active mode
[ 38.772050] hda: max request size: 1024KiB
[ 38.792458] hda: 117210240 sectors (60011 MB) w/7884KiB Cache,
CHS=16383/255/63, UDMA(100)
> > > #include
> > > #include
> > > #include
> > > #include
> > > #include
> > > #include
> > >
> > > int main(int argc, char *argv[])
> > > {
> > > unsigned char buf[8];
> > > int fd;
> > >
> > > if (argc < 2) {
> > > printf("%s \n", argv[0]);
> > > return 1;
> > > }
> > >
> > > fd = open(argv[1], O_RDONLY);
> > > if (fd == -1) {
> > > perror("open");
> > > return 1;
> > > }
> > >
> > > memset(buf, 0, sizeof(buf));
> > > buf[0] = 0xe1;
> > > buf[1] = 0x44;
> > > buf[3] = 0x4c;
> > > buf[4] = 0x4e;
> > > buf[5] = 0x55;
> > >
> > > if (ioctl(fd, HDIO_DRIVE_TASK, buf)) {
> > > perror("ioctl");
> > > return 1;
> > > }
> > >
> > > if (buf[3] == 0xc4)
> > > printf("head parked\n");
> > > else
> > > printf("head not parked %x\n", buf[3]);
> > >
> > > close(fd);
> > > return 0;
> > > }
Folkert van Heusden
--
Auto te koop, zie: http://www.vanheusden.com/daihatsu.php
Op zoek naar een IT of Finance baan? Mail me voor de mogelijkheden.
UNIX admin? Then give MultiTail (http://vanheusden.com/multitail/)
a try, it brings monitoring logfiles to a different level! See
http://vanheusden.com/multitail/features.html for a feature-list.
Phone: +31-6-41278122, PGP-key: 1F28D8AE
Get your PGP/GPG key signed at www.biglumber.com!
signature.asc
Description: Digital signature
Re: IBM HDAPS things are looking up (was: Re: [Hdaps-devel] Re: [ltp] IBM HDAPS Someone interested? (Accelerometer))
On Thu, Jul 07 2005, Dave Hansen wrote: > On Thu, 2005-07-07 at 19:27 +0200, Jens Axboe wrote: > > On Thu, Jul 07 2005, Clemens Koller wrote: > > > Well, sure, it's not a notebook HDD, but maybe it's possible > > > to give headpark a more generic way to get the heads parked? > > > > This _is_ the generic way, if your drive doesn't support it you are out > > of luck. > > I do wonder what is done in Windows, though... > > They had to have had a method to park the drive there, or they probably > wouldn't have even included the HDAPS driver in the first place. > Anybody wanna strace the Windows app? It's not unlikely that the drives that IBM shipped in that notebook used a "secret" command or subfeature to park the head. It's a little strange though, as they supposedly shipped various makes and models of drives with the hdaps included. If they did use a vendor unique command for parking the head, I bet it would be different for each make. -- Jens Axboe - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
Re: IBM HDAPS things are looking up (was: Re: [Hdaps-devel] Re: [ltp] IBM HDAPS Someone interested? (Accelerometer))
On Thu, 2005-07-07 at 14:01 -0400, Lee Revell wrote: > On Thu, 2005-07-07 at 10:38 -0700, Dave Hansen wrote: > > On Thu, 2005-07-07 at 19:27 +0200, Jens Axboe wrote: > > > This _is_ the generic way, if your drive doesn't support it you are out > > > of luck. > > > > I do wonder what is done in Windows, though... > > My guess would be that it silently upgrades the firmware if it detects > that head parking isn't supported. More likely that the things were shipped with firmware that only knows some proprietary method of doing that we don't know about. -- Dave - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
Re: IBM HDAPS things are looking up (was: Re: [Hdaps-devel] Re: [ltp] IBM HDAPS Someone interested? (Accelerometer))
On Thu, 2005-07-07 at 10:38 -0700, Dave Hansen wrote: > On Thu, 2005-07-07 at 19:27 +0200, Jens Axboe wrote: > > On Thu, Jul 07 2005, Clemens Koller wrote: > > > Well, sure, it's not a notebook HDD, but maybe it's possible > > > to give headpark a more generic way to get the heads parked? > > > > This _is_ the generic way, if your drive doesn't support it you are out > > of luck. > > I do wonder what is done in Windows, though... > My guess would be that it silently upgrades the firmware if it detects that head parking isn't supported. Lee - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
Re: IBM HDAPS things are looking up (was: Re: [Hdaps-devel] Re: [ltp] IBM HDAPS Someone interested? (Accelerometer))
Jens Axboe <[EMAIL PROTECTED]> wrote: > What is needed is to flesh out what the kernel interface should looke > like. I suggested a sysfs file for suspending and resuming access to the > device, if people have other ideas they should voice them. That sounds quite reasonable. Does it need to do anything other than park the head and suspend the command queue for that device? (On an only slightly related note, for full ACPI support of PATA, we're supposed to use the _GTF interface. This returns a set of taskfile commands that are then supposed to be executed by the host. However, at the point where we want to do this, the IDE queues haven't been restarted. Is the best solution here just to add a trivial and stupid IDE driver for managing the disks when we don't want userspace doing anything with them?) -- Matthew Garrett | [EMAIL PROTECTED] - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
Re: IBM HDAPS things are looking up (was: Re: [Hdaps-devel] Re: [ltp] IBM HDAPS Someone interested? (Accelerometer))
On Thu, Jul 07 2005, Alejandro Bonilla wrote: > > > Hello, > > > > Just for the records > > - > > [EMAIL PROTECTED]:~$ ./headpark /dev/hda > > head not parked 4c > > - > > > > HDD is a desktop Maxtor Diamond MaxPlus 9 120GB > > on a Promise Ultra133 TX2 IDE Controller. > > > > Well, sure, it's not a notebook HDD, but maybe it's possible > > to give headpark a more generic way to get the heads parked? > > > > Are the commands different per HDD model / manufacturer? > > Then we might need some information to send the proper > > commands to the different types?! > > And if there is no headpark command, might it be valuable to send > > the HDD a shutdown instead? > > > > PS: > > I'm working on an embedded PowerPC (MPC8540) system which > > will be turned into a high-resolution portable camera in > > the future (with acceleration sensors for the right image > > orientation). Therefore it will likely be another candidate > > for a Drop'n'Park or Drop'n'Stop (tm) feature as are planning > > to put a 2.5" notebook HDD into the cam, too. > > > > Greets, > > > > Clemens Koller > > Clemens, > > Thanks for bringing this up. We were actually in a conversation about > this subject in IRC a couple of minutes ago, and this actually came > up. It would be a good idea to kick this little script into the kernel > so that people that develop new accelerometers will be able to just > make the call from the script already in the kernel. What is needed is to flesh out what the kernel interface should looke like. I suggested a sysfs file for suspending and resuming access to the device, if people have other ideas they should voice them. > How do we go by making this script maybe more broad, or simple so that > it can be implemented on more devices? It's a test utility, I just wrote it so people could test. The actual command used woule be used in the internal implementation. The file itself holds no other value than for testing purposes. -- Jens Axboe - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
Re: IBM HDAPS things are looking up (was: Re: [Hdaps-devel] Re: [ltp] IBM HDAPS Someone interested? (Accelerometer))
On Thu, Jul 07 2005, Clemens Koller wrote: > Hello, > > Just for the records > - > [EMAIL PROTECTED]:~$ ./headpark /dev/hda > head not parked 4c > - > > HDD is a desktop Maxtor Diamond MaxPlus 9 120GB > on a Promise Ultra133 TX2 IDE Controller. > > Well, sure, it's not a notebook HDD, but maybe it's possible > to give headpark a more generic way to get the heads parked? This _is_ the generic way, if your drive doesn't support it you are out of luck. > Are the commands different per HDD model / manufacturer? > Then we might need some information to send the proper > commands to the different types?! Each drive may have a vendor unique way of parking the head. But for non-laptop drives, I would highly doubt it. > And if there is no headpark command, might it be valuable to send > the HDD a shutdown instead? That would be the solution. > PS: > I'm working on an embedded PowerPC (MPC8540) system which > will be turned into a high-resolution portable camera in > the future (with acceleration sensors for the right image > orientation). Therefore it will likely be another candidate > for a Drop'n'Park or Drop'n'Stop (tm) feature as are planning > to put a 2.5" notebook HDD into the cam, too. Just make sure to choose a suitable laptop drive, then. -- Jens Axboe - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
RE: IBM HDAPS things are looking up (was: Re: [Hdaps-devel] Re: [ltp] IBM HDAPS Someone interested? (Accelerometer))
> Hello, > > Just for the records > - > [EMAIL PROTECTED]:~$ ./headpark /dev/hda > head not parked 4c > - > > HDD is a desktop Maxtor Diamond MaxPlus 9 120GB > on a Promise Ultra133 TX2 IDE Controller. > > Well, sure, it's not a notebook HDD, but maybe it's possible > to give headpark a more generic way to get the heads parked? > > Are the commands different per HDD model / manufacturer? > Then we might need some information to send the proper > commands to the different types?! > And if there is no headpark command, might it be valuable to send > the HDD a shutdown instead? > > PS: > I'm working on an embedded PowerPC (MPC8540) system which > will be turned into a high-resolution portable camera in > the future (with acceleration sensors for the right image > orientation). Therefore it will likely be another candidate > for a Drop'n'Park or Drop'n'Stop (tm) feature as are planning > to put a 2.5" notebook HDD into the cam, too. > > Greets, > > Clemens Koller Clemens, Thanks for bringing this up. We were actually in a conversation about this subject in IRC a couple of minutes ago, and this actually came up. It would be a good idea to kick this little script into the kernel so that people that develop new accelerometers will be able to just make the call from the script already in the kernel. How do we go by making this script maybe more broad, or simple so that it can be implemented on more devices? We could either leave this for only some hard drives, like camera's and notebooks and use hdparm for other systems, or then use this script for all HD's. What could we do? .Alejandro - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
Re: IBM HDAPS things are looking up (was: Re: [Hdaps-devel] Re: [ltp] IBM HDAPS Someone interested? (Accelerometer))
Hello,
Just for the records
-
[EMAIL PROTECTED]:~$ ./headpark /dev/hda
head not parked 4c
-
HDD is a desktop Maxtor Diamond MaxPlus 9 120GB
on a Promise Ultra133 TX2 IDE Controller.
Well, sure, it's not a notebook HDD, but maybe it's possible
to give headpark a more generic way to get the heads parked?
Are the commands different per HDD model / manufacturer?
Then we might need some information to send the proper
commands to the different types?!
And if there is no headpark command, might it be valuable to send
the HDD a shutdown instead?
PS:
I'm working on an embedded PowerPC (MPC8540) system which
will be turned into a high-resolution portable camera in
the future (with acceleration sensors for the right image
orientation). Therefore it will likely be another candidate
for a Drop'n'Park or Drop'n'Stop (tm) feature as are planning
to put a 2.5" notebook HDD into the cam, too.
Greets,
Clemens Koller
___
R Imaging Devices
Anagramm GmbH
Rupert-Mayer-Str. 45/1
81379 Muenchen
Germany
http://www.anagramm.de
Phone: +49-89-741518-50
Fax: +49-89-741518-19
Jens Axboe wrote:
On Mon, Jul 04 2005, Jens Axboe wrote:
On Mon, Jul 04 2005, Lenz Grimmer wrote:
-BEGIN PGP SIGNED MESSAGE-
Hash: SHA1
Hi,
Jens Axboe wrote:
It isn't too pretty to rely on such unreliable timing anyways. I'm
not too crazy about spinning the disk down either, it's useless wear
compared to just parking the head.
Fully agreed, and that's the approach the IBM Windows driver seems to
take - you just hear the disk park its head when the sensor kicks in
(you can hear it) - the disk does not spin down when this happens.
Could this be some reserved ATA command that only works with certain#
drives?
Perhaps the IDLE or IDLEIMMEDIATE commands imply a head parking, that
would make sense. As you say, you can hear a drive parking its head.
Here's a test case, it doesn't sound like it's parking the hard here.
ATA7 defines a park maneuvre, I don't know how well supported it is yet
though. You can test with this little app, if it says 'head parked' it
works. If not, it has just idled the drive.
#include
#include
#include
#include
#include
#include
int main(int argc, char *argv[])
{
unsigned char buf[8];
int fd;
if (argc < 2) {
printf("%s \n", argv[0]);
return 1;
}
fd = open(argv[1], O_RDONLY);
if (fd == -1) {
perror("open");
return 1;
}
memset(buf, 0, sizeof(buf));
buf[0] = 0xe1;
buf[1] = 0x44;
buf[3] = 0x4c;
buf[4] = 0x4e;
buf[5] = 0x55;
if (ioctl(fd, HDIO_DRIVE_TASK, buf)) {
perror("ioctl");
return 1;
}
if (buf[3] == 0xc4)
printf("head parked\n");
else
printf("head not parked %x\n", buf[3]);
close(fd);
return 0;
}
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to [EMAIL PROTECTED]
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
Re: IBM HDAPS things are looking up (was: Re: [Hdaps-devel] Re: [ltp] IBM HDAPS Someone interested? (Accelerometer))
On Thu, Jul 07 2005, Alejandro Bonilla wrote: > Jens, > > Thanks for this util. :-) It will make things easier for us and do part > of > the Job we are looking for. I will post this script in the hdaps.sf.net for > people if it's ok with you. Knock yourself out, I have no interest in this myself as I don't have the hardware in question. This is all Lenz's fault! -- Jens Axboe - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
Re: IBM HDAPS things are looking up (was: Re: [Hdaps-devel] Re: [ltp] IBM HDAPS Someone interested? (Accelerometer))
On Thu, Jul 07 2005, Shawn Starr wrote: > > Model: HTS548080M9AT00 (Hitachi) > Laptop: T42. > > segfault:/home/spstarr# ./a /dev/hda > head parked > > Seems to park, heard it click :) Note on that - if the util says it parked, you can be very sure that it actually did as the drive actually returns that status outside of just completing the command. Just FYI for the people that are going to work on the surrounding support. -- Jens Axboe - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
Re: IBM HDAPS things are looking up (was: Re: [Hdaps-devel] Re: [ltp] IBM HDAPS Someone interested? (Accelerometer))
Model: HTS548080M9AT00 (Hitachi)
Laptop: T42.
segfault:/home/spstarr# ./a /dev/hda
head parked
Seems to park, heard it click :)
Shawn.
On July 7, 2005 04:03, Jens Axboe wrote:
> On Mon, Jul 04 2005, Jens Axboe wrote:
> > On Mon, Jul 04 2005, Lenz Grimmer wrote:
> > > -BEGIN PGP SIGNED MESSAGE-
> > > Hash: SHA1
> > >
> > > Hi,
> > >
> > > Jens Axboe wrote:
> > > > It isn't too pretty to rely on such unreliable timing anyways. I'm
> > > > not too crazy about spinning the disk down either, it's useless wear
> > > > compared to just parking the head.
> > >
> > > Fully agreed, and that's the approach the IBM Windows driver seems to
> > > take - you just hear the disk park its head when the sensor kicks in
> > > (you can hear it) - the disk does not spin down when this happens.
> > >
> > > Could this be some reserved ATA command that only works with certain#
> > > drives?
> >
> > Perhaps the IDLE or IDLEIMMEDIATE commands imply a head parking, that
> > would make sense. As you say, you can hear a drive parking its head.
> > Here's a test case, it doesn't sound like it's parking the hard here.
>
> ATA7 defines a park maneuvre, I don't know how well supported it is yet
> though. You can test with this little app, if it says 'head parked' it
> works. If not, it has just idled the drive.
>
>
> #include
> #include
> #include
> #include
> #include
> #include
>
> int main(int argc, char *argv[])
> {
> unsigned char buf[8];
> int fd;
>
> if (argc < 2) {
> printf("%s \n", argv[0]);
> return 1;
> }
>
> fd = open(argv[1], O_RDONLY);
> if (fd == -1) {
> perror("open");
> return 1;
> }
>
> memset(buf, 0, sizeof(buf));
> buf[0] = 0xe1;
> buf[1] = 0x44;
> buf[3] = 0x4c;
> buf[4] = 0x4e;
> buf[5] = 0x55;
>
> if (ioctl(fd, HDIO_DRIVE_TASK, buf)) {
> perror("ioctl");
> return 1;
> }
>
> if (buf[3] == 0xc4)
> printf("head parked\n");
> else
> printf("head not parked %x\n", buf[3]);
>
> close(fd);
> return 0;
> }
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to [EMAIL PROTECTED]
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
RE: IBM HDAPS things are looking up (was: Re: [Hdaps-devel] Re: [ltp] IBM HDAPS Someone interested? (Accelerometer))
Jens,
Thanks for this util. :-) It will make things easier for us and do part
of
the Job we are looking for. I will post this script in the hdaps.sf.net for
people if it's ok with you.
Thanks again,
.Alejandro
> > #include
> > #include
> > #include
> > #include
> > #include
> > #include
> >
> > int main(int argc, char *argv[])
> > {
> > unsigned char buf[8];
> > int fd;
> >
> > if (argc < 2) {
> > printf("%s \n", argv[0]);
> > return 1;
> > }
> >
> > fd = open(argv[1], O_RDONLY);
> > if (fd == -1) {
> > perror("open");
> > return 1;
> > }
> >
> > memset(buf, 0, sizeof(buf));
> > buf[0] = 0xe1;
> > buf[1] = 0x44;
> > buf[3] = 0x4c;
> > buf[4] = 0x4e;
> > buf[5] = 0x55;
> >
> > if (ioctl(fd, HDIO_DRIVE_TASK, buf)) {
> > perror("ioctl");
> > return 1;
> > }
> >
> > if (buf[3] == 0xc4)
> > printf("head parked\n");
> > else
> > printf("head not parked %x\n", buf[3]);
> >
> > close(fd);
> > return 0;
> > }
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to [EMAIL PROTECTED]
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
Re: IBM HDAPS things are looking up (was: Re: [Hdaps-devel] Re: [ltp] IBM HDAPS Someone interested? (Accelerometer))
Model: HTS548080M9AT00 (Hitachi)
Laptop: T42.
segfault:/home/spstarr# ./a /dev/hda
head parked
Seems to park, heard it click :)
Shawn.
On July 7, 2005 04:03, Jens Axboe wrote:
> On Mon, Jul 04 2005, Jens Axboe wrote:
> > On Mon, Jul 04 2005, Lenz Grimmer wrote:
> > > -BEGIN PGP SIGNED MESSAGE-
> > > Hash: SHA1
> > >
> > > Hi,
> > >
> > > Jens Axboe wrote:
> > > > It isn't too pretty to rely on such unreliable timing anyways. I'm
> > > > not too crazy about spinning the disk down either, it's useless wear
> > > > compared to just parking the head.
> > >
> > > Fully agreed, and that's the approach the IBM Windows driver seems to
> > > take - you just hear the disk park its head when the sensor kicks in
> > > (you can hear it) - the disk does not spin down when this happens.
> > >
> > > Could this be some reserved ATA command that only works with certain#
> > > drives?
> >
> > Perhaps the IDLE or IDLEIMMEDIATE commands imply a head parking, that
> > would make sense. As you say, you can hear a drive parking its head.
> > Here's a test case, it doesn't sound like it's parking the hard here.
>
> ATA7 defines a park maneuvre, I don't know how well supported it is yet
> though. You can test with this little app, if it says 'head parked' it
> works. If not, it has just idled the drive.
>
>
> #include
> #include
> #include
> #include
> #include
> #include
>
> int main(int argc, char *argv[])
> {
> unsigned char buf[8];
> int fd;
>
> if (argc < 2) {
> printf("%s \n", argv[0]);
> return 1;
> }
>
> fd = open(argv[1], O_RDONLY);
> if (fd == -1) {
> perror("open");
> return 1;
> }
>
> memset(buf, 0, sizeof(buf));
> buf[0] = 0xe1;
> buf[1] = 0x44;
> buf[3] = 0x4c;
> buf[4] = 0x4e;
> buf[5] = 0x55;
>
> if (ioctl(fd, HDIO_DRIVE_TASK, buf)) {
> perror("ioctl");
> return 1;
> }
>
> if (buf[3] == 0xc4)
> printf("head parked\n");
> else
> printf("head not parked %x\n", buf[3]);
>
> close(fd);
> return 0;
> }
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to [EMAIL PROTECTED]
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
Re: IBM HDAPS things are looking up (was: Re: [Hdaps-devel] Re: [ltp] IBM HDAPS Someone interested? (Accelerometer))
On Mon, Jul 04 2005, Jens Axboe wrote:
> On Mon, Jul 04 2005, Lenz Grimmer wrote:
> > -BEGIN PGP SIGNED MESSAGE-
> > Hash: SHA1
> >
> > Hi,
> >
> > Jens Axboe wrote:
> >
> > > It isn't too pretty to rely on such unreliable timing anyways. I'm
> > > not too crazy about spinning the disk down either, it's useless wear
> > > compared to just parking the head.
> >
> > Fully agreed, and that's the approach the IBM Windows driver seems to
> > take - you just hear the disk park its head when the sensor kicks in
> > (you can hear it) - the disk does not spin down when this happens.
> >
> > Could this be some reserved ATA command that only works with certain#
> > drives?
>
> Perhaps the IDLE or IDLEIMMEDIATE commands imply a head parking, that
> would make sense. As you say, you can hear a drive parking its head.
> Here's a test case, it doesn't sound like it's parking the hard here.
ATA7 defines a park maneuvre, I don't know how well supported it is yet
though. You can test with this little app, if it says 'head parked' it
works. If not, it has just idled the drive.
#include
#include
#include
#include
#include
#include
int main(int argc, char *argv[])
{
unsigned char buf[8];
int fd;
if (argc < 2) {
printf("%s \n", argv[0]);
return 1;
}
fd = open(argv[1], O_RDONLY);
if (fd == -1) {
perror("open");
return 1;
}
memset(buf, 0, sizeof(buf));
buf[0] = 0xe1;
buf[1] = 0x44;
buf[3] = 0x4c;
buf[4] = 0x4e;
buf[5] = 0x55;
if (ioctl(fd, HDIO_DRIVE_TASK, buf)) {
perror("ioctl");
return 1;
}
if (buf[3] == 0xc4)
printf("head parked\n");
else
printf("head not parked %x\n", buf[3]);
close(fd);
return 0;
}
--
Jens Axboe
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to [EMAIL PROTECTED]
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
Re: IBM HDAPS things are looking up (was: Re: [Hdaps-devel] Re: [ltp] IBM HDAPS Someone interested? (Accelerometer))
On Mon, Jul 04 2005, Jens Axboe wrote:
On Mon, Jul 04 2005, Lenz Grimmer wrote:
-BEGIN PGP SIGNED MESSAGE-
Hash: SHA1
Hi,
Jens Axboe wrote:
It isn't too pretty to rely on such unreliable timing anyways. I'm
not too crazy about spinning the disk down either, it's useless wear
compared to just parking the head.
Fully agreed, and that's the approach the IBM Windows driver seems to
take - you just hear the disk park its head when the sensor kicks in
(you can hear it) - the disk does not spin down when this happens.
Could this be some reserved ATA command that only works with certain#
drives?
Perhaps the IDLE or IDLEIMMEDIATE commands imply a head parking, that
would make sense. As you say, you can hear a drive parking its head.
Here's a test case, it doesn't sound like it's parking the hard here.
ATA7 defines a park maneuvre, I don't know how well supported it is yet
though. You can test with this little app, if it says 'head parked' it
works. If not, it has just idled the drive.
#include stdio.h
#include unistd.h
#include fcntl.h
#include string.h
#include sys/ioctl.h
#include linux/hdreg.h
int main(int argc, char *argv[])
{
unsigned char buf[8];
int fd;
if (argc 2) {
printf(%s dev\n, argv[0]);
return 1;
}
fd = open(argv[1], O_RDONLY);
if (fd == -1) {
perror(open);
return 1;
}
memset(buf, 0, sizeof(buf));
buf[0] = 0xe1;
buf[1] = 0x44;
buf[3] = 0x4c;
buf[4] = 0x4e;
buf[5] = 0x55;
if (ioctl(fd, HDIO_DRIVE_TASK, buf)) {
perror(ioctl);
return 1;
}
if (buf[3] == 0xc4)
printf(head parked\n);
else
printf(head not parked %x\n, buf[3]);
close(fd);
return 0;
}
--
Jens Axboe
-
To unsubscribe from this list: send the line unsubscribe linux-kernel in
the body of a message to [EMAIL PROTECTED]
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
Re: IBM HDAPS things are looking up (was: Re: [Hdaps-devel] Re: [ltp] IBM HDAPS Someone interested? (Accelerometer))
Model: HTS548080M9AT00 (Hitachi)
Laptop: T42.
segfault:/home/spstarr# ./a /dev/hda
head parked
Seems to park, heard it click :)
Shawn.
On July 7, 2005 04:03, Jens Axboe wrote:
On Mon, Jul 04 2005, Jens Axboe wrote:
On Mon, Jul 04 2005, Lenz Grimmer wrote:
-BEGIN PGP SIGNED MESSAGE-
Hash: SHA1
Hi,
Jens Axboe wrote:
It isn't too pretty to rely on such unreliable timing anyways. I'm
not too crazy about spinning the disk down either, it's useless wear
compared to just parking the head.
Fully agreed, and that's the approach the IBM Windows driver seems to
take - you just hear the disk park its head when the sensor kicks in
(you can hear it) - the disk does not spin down when this happens.
Could this be some reserved ATA command that only works with certain#
drives?
Perhaps the IDLE or IDLEIMMEDIATE commands imply a head parking, that
would make sense. As you say, you can hear a drive parking its head.
Here's a test case, it doesn't sound like it's parking the hard here.
ATA7 defines a park maneuvre, I don't know how well supported it is yet
though. You can test with this little app, if it says 'head parked' it
works. If not, it has just idled the drive.
#include stdio.h
#include unistd.h
#include fcntl.h
#include string.h
#include sys/ioctl.h
#include linux/hdreg.h
int main(int argc, char *argv[])
{
unsigned char buf[8];
int fd;
if (argc 2) {
printf(%s dev\n, argv[0]);
return 1;
}
fd = open(argv[1], O_RDONLY);
if (fd == -1) {
perror(open);
return 1;
}
memset(buf, 0, sizeof(buf));
buf[0] = 0xe1;
buf[1] = 0x44;
buf[3] = 0x4c;
buf[4] = 0x4e;
buf[5] = 0x55;
if (ioctl(fd, HDIO_DRIVE_TASK, buf)) {
perror(ioctl);
return 1;
}
if (buf[3] == 0xc4)
printf(head parked\n);
else
printf(head not parked %x\n, buf[3]);
close(fd);
return 0;
}
-
To unsubscribe from this list: send the line unsubscribe linux-kernel in
the body of a message to [EMAIL PROTECTED]
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
RE: IBM HDAPS things are looking up (was: Re: [Hdaps-devel] Re: [ltp] IBM HDAPS Someone interested? (Accelerometer))
Jens,
Thanks for this util. :-) It will make things easier for us and do part
of
the Job we are looking for. I will post this script in the hdaps.sf.net for
people if it's ok with you.
Thanks again,
.Alejandro
#include stdio.h
#include unistd.h
#include fcntl.h
#include string.h
#include sys/ioctl.h
#include linux/hdreg.h
int main(int argc, char *argv[])
{
unsigned char buf[8];
int fd;
if (argc 2) {
printf(%s dev\n, argv[0]);
return 1;
}
fd = open(argv[1], O_RDONLY);
if (fd == -1) {
perror(open);
return 1;
}
memset(buf, 0, sizeof(buf));
buf[0] = 0xe1;
buf[1] = 0x44;
buf[3] = 0x4c;
buf[4] = 0x4e;
buf[5] = 0x55;
if (ioctl(fd, HDIO_DRIVE_TASK, buf)) {
perror(ioctl);
return 1;
}
if (buf[3] == 0xc4)
printf(head parked\n);
else
printf(head not parked %x\n, buf[3]);
close(fd);
return 0;
}
-
To unsubscribe from this list: send the line unsubscribe linux-kernel in
the body of a message to [EMAIL PROTECTED]
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
Re: IBM HDAPS things are looking up (was: Re: [Hdaps-devel] Re: [ltp] IBM HDAPS Someone interested? (Accelerometer))
Model: HTS548080M9AT00 (Hitachi)
Laptop: T42.
segfault:/home/spstarr# ./a /dev/hda
head parked
Seems to park, heard it click :)
Shawn.
On July 7, 2005 04:03, Jens Axboe wrote:
On Mon, Jul 04 2005, Jens Axboe wrote:
On Mon, Jul 04 2005, Lenz Grimmer wrote:
-BEGIN PGP SIGNED MESSAGE-
Hash: SHA1
Hi,
Jens Axboe wrote:
It isn't too pretty to rely on such unreliable timing anyways. I'm
not too crazy about spinning the disk down either, it's useless wear
compared to just parking the head.
Fully agreed, and that's the approach the IBM Windows driver seems to
take - you just hear the disk park its head when the sensor kicks in
(you can hear it) - the disk does not spin down when this happens.
Could this be some reserved ATA command that only works with certain#
drives?
Perhaps the IDLE or IDLEIMMEDIATE commands imply a head parking, that
would make sense. As you say, you can hear a drive parking its head.
Here's a test case, it doesn't sound like it's parking the hard here.
ATA7 defines a park maneuvre, I don't know how well supported it is yet
though. You can test with this little app, if it says 'head parked' it
works. If not, it has just idled the drive.
#include stdio.h
#include unistd.h
#include fcntl.h
#include string.h
#include sys/ioctl.h
#include linux/hdreg.h
int main(int argc, char *argv[])
{
unsigned char buf[8];
int fd;
if (argc 2) {
printf(%s dev\n, argv[0]);
return 1;
}
fd = open(argv[1], O_RDONLY);
if (fd == -1) {
perror(open);
return 1;
}
memset(buf, 0, sizeof(buf));
buf[0] = 0xe1;
buf[1] = 0x44;
buf[3] = 0x4c;
buf[4] = 0x4e;
buf[5] = 0x55;
if (ioctl(fd, HDIO_DRIVE_TASK, buf)) {
perror(ioctl);
return 1;
}
if (buf[3] == 0xc4)
printf(head parked\n);
else
printf(head not parked %x\n, buf[3]);
close(fd);
return 0;
}
-
To unsubscribe from this list: send the line unsubscribe linux-kernel in
the body of a message to [EMAIL PROTECTED]
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
Re: IBM HDAPS things are looking up (was: Re: [Hdaps-devel] Re: [ltp] IBM HDAPS Someone interested? (Accelerometer))
On Thu, Jul 07 2005, Shawn Starr wrote: Model: HTS548080M9AT00 (Hitachi) Laptop: T42. segfault:/home/spstarr# ./a /dev/hda head parked Seems to park, heard it click :) Note on that - if the util says it parked, you can be very sure that it actually did as the drive actually returns that status outside of just completing the command. Just FYI for the people that are going to work on the surrounding support. -- Jens Axboe - To unsubscribe from this list: send the line unsubscribe linux-kernel in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
Re: IBM HDAPS things are looking up (was: Re: [Hdaps-devel] Re: [ltp] IBM HDAPS Someone interested? (Accelerometer))
On Thu, Jul 07 2005, Alejandro Bonilla wrote: Jens, Thanks for this util. :-) It will make things easier for us and do part of the Job we are looking for. I will post this script in the hdaps.sf.net for people if it's ok with you. Knock yourself out, I have no interest in this myself as I don't have the hardware in question. This is all Lenz's fault! -- Jens Axboe - To unsubscribe from this list: send the line unsubscribe linux-kernel in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
Re: IBM HDAPS things are looking up (was: Re: [Hdaps-devel] Re: [ltp] IBM HDAPS Someone interested? (Accelerometer))
Hello,
Just for the records
-
[EMAIL PROTECTED]:~$ ./headpark /dev/hda
head not parked 4c
-
HDD is a desktop Maxtor Diamond MaxPlus 9 120GB
on a Promise Ultra133 TX2 IDE Controller.
Well, sure, it's not a notebook HDD, but maybe it's possible
to give headpark a more generic way to get the heads parked?
Are the commands different per HDD model / manufacturer?
Then we might need some information to send the proper
commands to the different types?!
And if there is no headpark command, might it be valuable to send
the HDD a shutdown instead?
PS:
I'm working on an embedded PowerPC (MPC8540) system which
will be turned into a high-resolution portable camera in
the future (with acceleration sensors for the right image
orientation). Therefore it will likely be another candidate
for a Drop'n'Park or Drop'n'Stop (tm) feature as are planning
to put a 2.5 notebook HDD into the cam, too.
Greets,
Clemens Koller
___
RD Imaging Devices
Anagramm GmbH
Rupert-Mayer-Str. 45/1
81379 Muenchen
Germany
http://www.anagramm.de
Phone: +49-89-741518-50
Fax: +49-89-741518-19
Jens Axboe wrote:
On Mon, Jul 04 2005, Jens Axboe wrote:
On Mon, Jul 04 2005, Lenz Grimmer wrote:
-BEGIN PGP SIGNED MESSAGE-
Hash: SHA1
Hi,
Jens Axboe wrote:
It isn't too pretty to rely on such unreliable timing anyways. I'm
not too crazy about spinning the disk down either, it's useless wear
compared to just parking the head.
Fully agreed, and that's the approach the IBM Windows driver seems to
take - you just hear the disk park its head when the sensor kicks in
(you can hear it) - the disk does not spin down when this happens.
Could this be some reserved ATA command that only works with certain#
drives?
Perhaps the IDLE or IDLEIMMEDIATE commands imply a head parking, that
would make sense. As you say, you can hear a drive parking its head.
Here's a test case, it doesn't sound like it's parking the hard here.
ATA7 defines a park maneuvre, I don't know how well supported it is yet
though. You can test with this little app, if it says 'head parked' it
works. If not, it has just idled the drive.
#include stdio.h
#include unistd.h
#include fcntl.h
#include string.h
#include sys/ioctl.h
#include linux/hdreg.h
int main(int argc, char *argv[])
{
unsigned char buf[8];
int fd;
if (argc 2) {
printf(%s dev\n, argv[0]);
return 1;
}
fd = open(argv[1], O_RDONLY);
if (fd == -1) {
perror(open);
return 1;
}
memset(buf, 0, sizeof(buf));
buf[0] = 0xe1;
buf[1] = 0x44;
buf[3] = 0x4c;
buf[4] = 0x4e;
buf[5] = 0x55;
if (ioctl(fd, HDIO_DRIVE_TASK, buf)) {
perror(ioctl);
return 1;
}
if (buf[3] == 0xc4)
printf(head parked\n);
else
printf(head not parked %x\n, buf[3]);
close(fd);
return 0;
}
-
To unsubscribe from this list: send the line unsubscribe linux-kernel in
the body of a message to [EMAIL PROTECTED]
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
RE: IBM HDAPS things are looking up (was: Re: [Hdaps-devel] Re: [ltp] IBM HDAPS Someone interested? (Accelerometer))
Hello, Just for the records - [EMAIL PROTECTED]:~$ ./headpark /dev/hda head not parked 4c - HDD is a desktop Maxtor Diamond MaxPlus 9 120GB on a Promise Ultra133 TX2 IDE Controller. Well, sure, it's not a notebook HDD, but maybe it's possible to give headpark a more generic way to get the heads parked? Are the commands different per HDD model / manufacturer? Then we might need some information to send the proper commands to the different types?! And if there is no headpark command, might it be valuable to send the HDD a shutdown instead? PS: I'm working on an embedded PowerPC (MPC8540) system which will be turned into a high-resolution portable camera in the future (with acceleration sensors for the right image orientation). Therefore it will likely be another candidate for a Drop'n'Park or Drop'n'Stop (tm) feature as are planning to put a 2.5 notebook HDD into the cam, too. Greets, Clemens Koller Clemens, Thanks for bringing this up. We were actually in a conversation about this subject in IRC a couple of minutes ago, and this actually came up. It would be a good idea to kick this little script into the kernel so that people that develop new accelerometers will be able to just make the call from the script already in the kernel. How do we go by making this script maybe more broad, or simple so that it can be implemented on more devices? We could either leave this for only some hard drives, like camera's and notebooks and use hdparm for other systems, or then use this script for all HD's. What could we do? .Alejandro - To unsubscribe from this list: send the line unsubscribe linux-kernel in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
Re: IBM HDAPS things are looking up (was: Re: [Hdaps-devel] Re: [ltp] IBM HDAPS Someone interested? (Accelerometer))
On Thu, Jul 07 2005, Clemens Koller wrote: Hello, Just for the records - [EMAIL PROTECTED]:~$ ./headpark /dev/hda head not parked 4c - HDD is a desktop Maxtor Diamond MaxPlus 9 120GB on a Promise Ultra133 TX2 IDE Controller. Well, sure, it's not a notebook HDD, but maybe it's possible to give headpark a more generic way to get the heads parked? This _is_ the generic way, if your drive doesn't support it you are out of luck. Are the commands different per HDD model / manufacturer? Then we might need some information to send the proper commands to the different types?! Each drive may have a vendor unique way of parking the head. But for non-laptop drives, I would highly doubt it. And if there is no headpark command, might it be valuable to send the HDD a shutdown instead? That would be the solution. PS: I'm working on an embedded PowerPC (MPC8540) system which will be turned into a high-resolution portable camera in the future (with acceleration sensors for the right image orientation). Therefore it will likely be another candidate for a Drop'n'Park or Drop'n'Stop (tm) feature as are planning to put a 2.5 notebook HDD into the cam, too. Just make sure to choose a suitable laptop drive, then. -- Jens Axboe - To unsubscribe from this list: send the line unsubscribe linux-kernel in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
Re: IBM HDAPS things are looking up (was: Re: [Hdaps-devel] Re: [ltp] IBM HDAPS Someone interested? (Accelerometer))
On Thu, Jul 07 2005, Alejandro Bonilla wrote: Hello, Just for the records - [EMAIL PROTECTED]:~$ ./headpark /dev/hda head not parked 4c - HDD is a desktop Maxtor Diamond MaxPlus 9 120GB on a Promise Ultra133 TX2 IDE Controller. Well, sure, it's not a notebook HDD, but maybe it's possible to give headpark a more generic way to get the heads parked? Are the commands different per HDD model / manufacturer? Then we might need some information to send the proper commands to the different types?! And if there is no headpark command, might it be valuable to send the HDD a shutdown instead? PS: I'm working on an embedded PowerPC (MPC8540) system which will be turned into a high-resolution portable camera in the future (with acceleration sensors for the right image orientation). Therefore it will likely be another candidate for a Drop'n'Park or Drop'n'Stop (tm) feature as are planning to put a 2.5 notebook HDD into the cam, too. Greets, Clemens Koller Clemens, Thanks for bringing this up. We were actually in a conversation about this subject in IRC a couple of minutes ago, and this actually came up. It would be a good idea to kick this little script into the kernel so that people that develop new accelerometers will be able to just make the call from the script already in the kernel. What is needed is to flesh out what the kernel interface should looke like. I suggested a sysfs file for suspending and resuming access to the device, if people have other ideas they should voice them. How do we go by making this script maybe more broad, or simple so that it can be implemented on more devices? It's a test utility, I just wrote it so people could test. The actual command used woule be used in the internal implementation. The file itself holds no other value than for testing purposes. -- Jens Axboe - To unsubscribe from this list: send the line unsubscribe linux-kernel in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
Re: IBM HDAPS things are looking up (was: Re: [Hdaps-devel] Re: [ltp] IBM HDAPS Someone interested? (Accelerometer))
Jens Axboe [EMAIL PROTECTED] wrote: What is needed is to flesh out what the kernel interface should looke like. I suggested a sysfs file for suspending and resuming access to the device, if people have other ideas they should voice them. That sounds quite reasonable. Does it need to do anything other than park the head and suspend the command queue for that device? (On an only slightly related note, for full ACPI support of PATA, we're supposed to use the _GTF interface. This returns a set of taskfile commands that are then supposed to be executed by the host. However, at the point where we want to do this, the IDE queues haven't been restarted. Is the best solution here just to add a trivial and stupid IDE driver for managing the disks when we don't want userspace doing anything with them?) -- Matthew Garrett | [EMAIL PROTECTED] - To unsubscribe from this list: send the line unsubscribe linux-kernel in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
Re: IBM HDAPS things are looking up (was: Re: [Hdaps-devel] Re: [ltp] IBM HDAPS Someone interested? (Accelerometer))
On Thu, 2005-07-07 at 10:38 -0700, Dave Hansen wrote: On Thu, 2005-07-07 at 19:27 +0200, Jens Axboe wrote: On Thu, Jul 07 2005, Clemens Koller wrote: Well, sure, it's not a notebook HDD, but maybe it's possible to give headpark a more generic way to get the heads parked? This _is_ the generic way, if your drive doesn't support it you are out of luck. I do wonder what is done in Windows, though... My guess would be that it silently upgrades the firmware if it detects that head parking isn't supported. Lee - To unsubscribe from this list: send the line unsubscribe linux-kernel in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
Re: IBM HDAPS things are looking up (was: Re: [Hdaps-devel] Re: [ltp] IBM HDAPS Someone interested? (Accelerometer))
On Thu, 2005-07-07 at 14:01 -0400, Lee Revell wrote: On Thu, 2005-07-07 at 10:38 -0700, Dave Hansen wrote: On Thu, 2005-07-07 at 19:27 +0200, Jens Axboe wrote: This _is_ the generic way, if your drive doesn't support it you are out of luck. I do wonder what is done in Windows, though... My guess would be that it silently upgrades the firmware if it detects that head parking isn't supported. More likely that the things were shipped with firmware that only knows some proprietary method of doing that we don't know about. -- Dave - To unsubscribe from this list: send the line unsubscribe linux-kernel in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
Re: IBM HDAPS things are looking up (was: Re: [Hdaps-devel] Re: [ltp] IBM HDAPS Someone interested? (Accelerometer))
On Thu, Jul 07 2005, Dave Hansen wrote: On Thu, 2005-07-07 at 19:27 +0200, Jens Axboe wrote: On Thu, Jul 07 2005, Clemens Koller wrote: Well, sure, it's not a notebook HDD, but maybe it's possible to give headpark a more generic way to get the heads parked? This _is_ the generic way, if your drive doesn't support it you are out of luck. I do wonder what is done in Windows, though... They had to have had a method to park the drive there, or they probably wouldn't have even included the HDAPS driver in the first place. Anybody wanna strace the Windows app? It's not unlikely that the drives that IBM shipped in that notebook used a secret command or subfeature to park the head. It's a little strange though, as they supposedly shipped various makes and models of drives with the hdaps included. If they did use a vendor unique command for parking the head, I bet it would be different for each make. -- Jens Axboe - To unsubscribe from this list: send the line unsubscribe linux-kernel in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
Re: IBM HDAPS things are looking up (was: Re: [Hdaps-devel] Re: [ltp] IBM HDAPS Someone interested? (Accelerometer))
Doesn't park here:
ehm:/home/folkert# ./park /dev/hda
head not parked 4c
ehm:/home/folkert# hdparm -i /dev/hda
/dev/hda:
Model=IC25N060ATMR04-0, FwRev=MO3OAD5A, SerialNo=MRG357K3KKN0XH
Config={ HardSect NotMFM HdSw15uSec Fixed DTR10Mbs }
RawCHS=16383/16/63, TrkSize=0, SectSize=0, ECCbytes=4
BuffType=DualPortCache, BuffSize=7884kB, MaxMultSect=16, MultSect=16
CurCHS=16383/16/63, CurSects=16514064, LBA=yes, LBAsects=117210240
IORDY=on/off, tPIO={min:240,w/IORDY:120}, tDMA={min:120,rec:120}
PIO modes: pio0 pio1 pio2 pio3 pio4
DMA modes: mdma0 mdma1 mdma2
UDMA modes: udma0 udma1 udma2 udma3 udma4 *udma5
AdvancedPM=yes: mode=0x80 (128) WriteCache=enabled
Drive conforms to: ATA/ATAPI-6 T13 1410D revision 3a:
* signifies the current active mode
[ 38.772050] hda: max request size: 1024KiB
[ 38.792458] hda: 117210240 sectors (60011 MB) w/7884KiB Cache,
CHS=16383/255/63, UDMA(100)
#include stdio.h
#include unistd.h
#include fcntl.h
#include string.h
#include sys/ioctl.h
#include linux/hdreg.h
int main(int argc, char *argv[])
{
unsigned char buf[8];
int fd;
if (argc 2) {
printf(%s dev\n, argv[0]);
return 1;
}
fd = open(argv[1], O_RDONLY);
if (fd == -1) {
perror(open);
return 1;
}
memset(buf, 0, sizeof(buf));
buf[0] = 0xe1;
buf[1] = 0x44;
buf[3] = 0x4c;
buf[4] = 0x4e;
buf[5] = 0x55;
if (ioctl(fd, HDIO_DRIVE_TASK, buf)) {
perror(ioctl);
return 1;
}
if (buf[3] == 0xc4)
printf(head parked\n);
else
printf(head not parked %x\n, buf[3]);
close(fd);
return 0;
}
Folkert van Heusden
--
Auto te koop, zie: http://www.vanheusden.com/daihatsu.php
Op zoek naar een IT of Finance baan? Mail me voor de mogelijkheden.
UNIX admin? Then give MultiTail (http://vanheusden.com/multitail/)
a try, it brings monitoring logfiles to a different level! See
http://vanheusden.com/multitail/features.html for a feature-list.
Phone: +31-6-41278122, PGP-key: 1F28D8AE
Get your PGP/GPG key signed at www.biglumber.com!
signature.asc
Description: Digital signature
Re: IBM HDAPS things are looking up (was: Re: [Hdaps-devel] Re: [ltp] IBM HDAPS Someone interested? (Accelerometer))
On Thu, Jul 07 2005, Matthew Garrett wrote: Jens Axboe [EMAIL PROTECTED] wrote: What is needed is to flesh out what the kernel interface should looke like. I suggested a sysfs file for suspending and resuming access to the device, if people have other ideas they should voice them. That sounds quite reasonable. Does it need to do anything other than park the head and suspend the command queue for that device? Not really, no. Someone mentioned a timeout for this as well, but I think that should just be done in user space. (On an only slightly related note, for full ACPI support of PATA, we're supposed to use the _GTF interface. This returns a set of taskfile commands that are then supposed to be executed by the host. However, at the point where we want to do this, the IDE queues haven't been restarted. Is the best solution here just to add a trivial and stupid IDE driver for managing the disks when we don't want userspace doing anything with them?) Either that, or always allow non-fs commands to go through a frozen queue. Or flag those commands as ok for a frozen queue. The advantage of either of those approaches, is that we probably don't have to add any kernel support then and the generic block device freezing/unfreezing can be used. -- Jens Axboe - To unsubscribe from this list: send the line unsubscribe linux-kernel in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
Re: IBM HDAPS things are looking up (was: Re: [Hdaps-devel] Re: [ltp] IBM HDAPS Someone interested? (Accelerometer))
Jens Axboe wrote: On Thu, Jul 07 2005, Shawn Starr wrote: Model: HTS548080M9AT00 (Hitachi) Laptop: T42. segfault:/home/spstarr# ./a /dev/hda head parked Seems to park, heard it click :) Note on that - if the util says it parked, you can be very sure that it actually did as the drive actually returns that status outside of just completing the command. It's worth noting that you'll need the libata passthrough patch to make this work on a T43.. However, with this patch I'm getting the head not parked 4c message, but I can hear the click from the drive.. It takes around 350-400ms for the command to execute, but when repeated, it drops to around 5ms for a short while (with no audible clicking), before reverting to original behaviour after a few seconds. The clicking and the variation in execution time lead me to think it is parking, but not being reported correctly? Regards, Jon, __ Email via Mailtraq4Free from Enstar (www.mailtraqdirect.co.uk) - To unsubscribe from this list: send the line unsubscribe linux-kernel in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
Re: IBM HDAPS things are looking up (was: Re: [Hdaps-devel] Re: [ltp] IBM HDAPS Someone interested? (Accelerometer))
Jon Escombe wrote: Jens Axboe wrote: Note on that - if the util says it parked, you can be very sure that it actually did as the drive actually returns that status outside of just completing the command. It's worth noting that you'll need the libata passthrough patch to make this work on a T43.. However, with this patch I'm getting the head not parked 4c message, but I can hear the click from the drive.. It takes around 350-400ms for the command to execute, but when repeated, it drops to around 5ms for a short while (with no audible clicking), before reverting to original behaviour after a few seconds. The clicking and the variation in execution time lead me to think it is parking, but not being reported correctly? Regards, Jon, Jon, Most likely it might be doing it but returning inmediately. If you are in a quiet place, you should be able to notice the change. You can test this by having 2 consoles. With one you run the command and with the other one, try going deep into the filesystem, you should notice that it takes awhile to find the files and folders. If it is fast, then is not parking. .Alejandro - To unsubscribe from this list: send the line unsubscribe linux-kernel in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
Re: IBM HDAPS things are looking up (was: Re: [Hdaps-devel] Re: [ltp] IBM HDAPS Someone interested? (Accelerometer))
Clemens Koller [EMAIL PROTECTED] wrote: Well, sure, it's not a notebook HDD, but maybe it's possible to give headpark a more generic way to get the heads parked? I remember my old MFM HDD, which had a Landing Zone stored in the BIOS to which the park command would seek. Maybe you could do something similar and park the head on the last cylinder if the other options fail. -- Ich danke GMX dafür, die Verwendung meiner Adressen mittels per SPF verbreiteten Lügen zu sabotieren. - To unsubscribe from this list: send the line unsubscribe linux-kernel in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
Re: IBM HDAPS things are looking up (was: Re: [Hdaps-devel] Re: [ltp] IBM HDAPS Someone interested? (Accelerometer))
Alejandro Bonilla wrote (ao): > If you check the IBM software in Windows, it shows 2 things. > First, when it pauses the HD and when it stops the HD. It all > depends on how hard you hit the PC. In one we suspend the drive > and in the other we park the drive. This is not true. The software only parks the head, it does not spin down the disk. That would take too much time to protect against a fall anyway. Sander -- Humilis IT Services and Solutions http://www.humilis.net - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
RE: IBM HDAPS things are looking up (was: Re: [Hdaps-devel] Re: [ltp] IBM HDAPS Someone interested? (Accelerometer))
> Alejandro Bonilla wrote (ao): > > If you check the IBM software in Windows, it shows 2 things. > > First, when it pauses the HD and when it stops the HD. It all > > depends on how hard you hit the PC. In one we suspend the drive > > and in the other we park the drive. > > This is not true. The software only parks the head, it does not spin > down the disk. That would take too much time to protect against a fall > anyway. > > Sander Sander, Sorry for not making myself clear "In one we suspend the drive and in the other we park the drive" means that it would be nice to do that in Linux. We don't have to do things like Windows does them. We can improve them to our needs. In windows, there are 2 Simbols. 1. When the drive detects vibration and then pauses the HD(yellow II sign in the taskbar) 2. When the HD is stop when a free fall is detected. (Red simbol in the Taskbar) Please check it out in windows so you can see what I'm talking about. .Alejandro - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
RE: IBM HDAPS things are looking up (was: Re: [Hdaps-devel] Re: [ltp] IBM HDAPS Someone interested? (Accelerometer))
On Tue, 2005-07-05 at 06:29 -0600, Alejandro Bonilla wrote: > .Alejandro > (removing some people so they don't get triplicated emails) Please don't trim cc: lists! We *want* the duplicate emails, so that one goes in the Inbox and one in the LKML folder. See the list archives for more reasons why it'd bad to trim cc: lists. Lee - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
RE: IBM HDAPS things are looking up (was: Re: [Hdaps-devel] Re: [ltp] IBM HDAPS Someone interested? (Accelerometer))
> > As Lenz already suggested, you both pretty much seem to be describing > laptop mode. See the documentation. > > -- > Jens Axboe > Jens, Yes, I know about laptop_mode, I always use it, but HD APS does not automatically starts laptop_mode currently. That's why I was spitting out that it could be a good idea to kick something like laptop_mode or laptop_mode if normall vibration is detected, and then if higher vibration or tilting numbers are detected, then park the head. If you check the IBM software in Windows, it shows 2 things. First, when it pauses the HD and when it stops the HD. It all depends on how hard you hit the PC. In one we suspend the drive and in the other we park the drive. .Alejandro (removing some people so they don't get triplicated emails) - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
Re: IBM HDAPS things are looking up (was: Re: [Hdaps-devel] Re: [ltp] IBM HDAPS Someone interested? (Accelerometer))
On Mon, Jul 04 2005, Alejandro Bonilla wrote: > Pavel Machek wrote: > > > > >Actually, "spin disk down and keep it down" would be nice for other > >reasons. Taking computer for a jog playing mp3s from ramdisk is > >something I'd like to do... > > Pavel > > > > > This is exactly what I wanted to do. hdparm suspend which would send > things to cache or buffer and then copy or get files only when needed. I > just hope is fast enough, but we could trigger this with tilting or > vibration and then something heavier when we find a free fall. > > This driver does not exactly has to behave like Windows. It can be > better. We always make things better. As Lenz already suggested, you both pretty much seem to be describing laptop mode. See the documentation. -- Jens Axboe - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
Re: IBM HDAPS things are looking up (was: Re: [Hdaps-devel] Re: [ltp] IBM HDAPS Someone interested? (Accelerometer))
On Mon, Jul 04 2005, Alejandro Bonilla wrote: Pavel Machek wrote: Actually, spin disk down and keep it down would be nice for other reasons. Taking computer for a jog playing mp3s from ramdisk is something I'd like to do... Pavel This is exactly what I wanted to do. hdparm suspend which would send things to cache or buffer and then copy or get files only when needed. I just hope is fast enough, but we could trigger this with tilting or vibration and then something heavier when we find a free fall. This driver does not exactly has to behave like Windows. It can be better. We always make things better. As Lenz already suggested, you both pretty much seem to be describing laptop mode. See the documentation. -- Jens Axboe - To unsubscribe from this list: send the line unsubscribe linux-kernel in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
RE: IBM HDAPS things are looking up (was: Re: [Hdaps-devel] Re: [ltp] IBM HDAPS Someone interested? (Accelerometer))
As Lenz already suggested, you both pretty much seem to be describing laptop mode. See the documentation. -- Jens Axboe Jens, Yes, I know about laptop_mode, I always use it, but HD APS does not automatically starts laptop_mode currently. That's why I was spitting out that it could be a good idea to kick something like laptop_mode or laptop_mode if normall vibration is detected, and then if higher vibration or tilting numbers are detected, then park the head. If you check the IBM software in Windows, it shows 2 things. First, when it pauses the HD and when it stops the HD. It all depends on how hard you hit the PC. In one we suspend the drive and in the other we park the drive. .Alejandro (removing some people so they don't get triplicated emails) - To unsubscribe from this list: send the line unsubscribe linux-kernel in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
RE: IBM HDAPS things are looking up (was: Re: [Hdaps-devel] Re: [ltp] IBM HDAPS Someone interested? (Accelerometer))
On Tue, 2005-07-05 at 06:29 -0600, Alejandro Bonilla wrote: .Alejandro (removing some people so they don't get triplicated emails) Please don't trim cc: lists! We *want* the duplicate emails, so that one goes in the Inbox and one in the LKML folder. See the list archives for more reasons why it'd bad to trim cc: lists. Lee - To unsubscribe from this list: send the line unsubscribe linux-kernel in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
RE: IBM HDAPS things are looking up (was: Re: [Hdaps-devel] Re: [ltp] IBM HDAPS Someone interested? (Accelerometer))
Alejandro Bonilla wrote (ao): If you check the IBM software in Windows, it shows 2 things. First, when it pauses the HD and when it stops the HD. It all depends on how hard you hit the PC. In one we suspend the drive and in the other we park the drive. This is not true. The software only parks the head, it does not spin down the disk. That would take too much time to protect against a fall anyway. Sander Sander, Sorry for not making myself clear In one we suspend the drive and in the other we park the drive means that it would be nice to do that in Linux. We don't have to do things like Windows does them. We can improve them to our needs. In windows, there are 2 Simbols. 1. When the drive detects vibration and then pauses the HD(yellow II sign in the taskbar) 2. When the HD is stop when a free fall is detected. (Red simbol in the Taskbar) Please check it out in windows so you can see what I'm talking about. .Alejandro - To unsubscribe from this list: send the line unsubscribe linux-kernel in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
Re: IBM HDAPS things are looking up (was: Re: [Hdaps-devel] Re: [ltp] IBM HDAPS Someone interested? (Accelerometer))
Alejandro Bonilla wrote (ao): If you check the IBM software in Windows, it shows 2 things. First, when it pauses the HD and when it stops the HD. It all depends on how hard you hit the PC. In one we suspend the drive and in the other we park the drive. This is not true. The software only parks the head, it does not spin down the disk. That would take too much time to protect against a fall anyway. Sander -- Humilis IT Services and Solutions http://www.humilis.net - To unsubscribe from this list: send the line unsubscribe linux-kernel in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
Re: IBM HDAPS things are looking up (was: Re: [Hdaps-devel] Re: [ltp] IBM HDAPS Someone interested? (Accelerometer))
Pavel Machek wrote: Actually, "spin disk down and keep it down" would be nice for other reasons. Taking computer for a jog playing mp3s from ramdisk is something I'd like to do... Pavel This is exactly what I wanted to do. hdparm suspend which would send things to cache or buffer and then copy or get files only when needed. I just hope is fast enough, but we could trigger this with tilting or vibration and then something heavier when we find a free fall. This driver does not exactly has to behave like Windows. It can be better. We always make things better. .Alejandro - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
Re: IBM HDAPS things are looking up (was: Re: [Hdaps-devel] Re: [ltp] IBM HDAPS Someone interested? (Accelerometer))
Hi! > > > > This is exactly what I said. Use hdparm to make the HD park > > > > inmediatelly. I did send the email to the HDPARM developer, but he > > > > never > > > > replied. I asked him what would be the best way to make the HD park > > > > with > > > > no exception and then let it come back 5 or 10 seconds later. > > > > > > IIRC, you don't have to do anything to wake up the drive after a > > > STANDBYNOW command, if you want to be on the safe side you just issue an > > > IDLEIMMEDIATE. So your code will look something like: > > > > the problem for this will be that this app will also want to prevent ANY > > io going to the disk for a few seconds. > > > > I mean, what use is parking the head if you notice the laptop falling, > > when the kernel submits IO to it and wakes it up again before it hits > > the ground :) > > Yeah, that likely needs a little help from the ide driver. If you force > a spindown, you will effectively have parked the head for as long as the > spindown + spinup takes. That could turn out to be enough, it will take > more than 1-2 seconds anyways. Actually, "spin disk down and keep it down" would be nice for other reasons. Taking computer for a jog playing mp3s from ramdisk is something I'd like to do... Pavel -- 64 bytes from 195.113.31.123: icmp_seq=28 ttl=51 time=448769.1 ms - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
Re: IBM HDAPS things are looking up (was: Re: [Hdaps-devel] Re: [ltp] IBM HDAPS Someone interested? (Accelerometer))
Hi! > > BTW, we are on irc.freenode.org in #hdaps If anyone is interested. > > > > .Alejandro > > > I just had a nice chat with the guys there and we got some > improvements made by them and us merged up. And I /think/ we agreed > that I'll maintain the driver, merge fixes/features etc and eventually > try to get it merged. > > Currently the driver loads, initializes the accelerometer and we can > read data from it. > I'll be working on adding sysfs stuff to it tomorrow so it's generally > useful (at least for monitoring things - not yet for parking disk Actually you should probably implement it as an input device; no need to mess with sysfs. drivers/input/accell ? Pavel -- 64 bytes from 195.113.31.123: icmp_seq=28 ttl=51 time=448769.1 ms - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
Re: IBM HDAPS things are looking up (was: Re: [Hdaps-devel] Re: [ltp] IBM HDAPS Someone interested? (Accelerometer))
-BEGIN PGP SIGNED MESSAGE- Hash: SHA1 Hi, Aaron Cohen wrote: > Can't the accelerometer be used as an input device in addition to just > being a "about to fall detector?" Yes, it can - the kernel driver just prints the data taken from the accelerometer. It's up to another application to make sense out of this. One purpose would be the mentioned "fall detector" that would then instruct the disk drive to part its head. > I seem to remember games where the the input method involved tilting > the device in the direction you want a marble to roll or something > like that. Correct, that would be one option. Mark Smith (they IBM guy who wrote up the information required to write the kernel module) actually mentioned he had patched SDL to support the accelerometer as an input device. Playing "Neverball" by tilting your Laptop sounds like fun :) Bye, LenZ - -- - -- Lenz Grimmer <[EMAIL PROTECTED]> -o) [ICQ: 160767607 | Jabber: [EMAIL PROTECTED]/\\ http://www.lenzg.org/ V_V -BEGIN PGP SIGNATURE- Version: GnuPG v1.4.0 (GNU/Linux) Comment: Using GnuPG with Thunderbird - http://enigmail.mozdev.org iD8DBQFCyY20SVDhKrJykfIRAjo/AJ0dyN0GXE7U5H3+updjuMKALoHlXQCdExrA FwgCv2ELKCc9cC0M47E5B+w= =pigJ -END PGP SIGNATURE- - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
Re: IBM HDAPS things are looking up (was: Re: [Hdaps-devel] Re: [ltp] IBM HDAPS Someone interested? (Accelerometer))
On 7/4/05, Jens Axboe <[EMAIL PROTECTED]> wrote: > Generel observation on this driver - why isn't it just contained in user > space? You need to do the monitoring and sending of ide commands from > there anyways, I don't see the point of putting it in the kernel. > Can't the accelerometer be used as an input device in addition to just being a "about to fall detector?" I seem to remember games where the the input method involved tilting the device in the direction you want a marble to roll or something like that. - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
Re: IBM HDAPS things are looking up (was: Re: [Hdaps-devel] Re: [ltp] IBM HDAPS Someone interested? (Accelerometer))
(don't top post!) On Mon, Jul 04 2005, Shawn Starr wrote: > > We could put it in userspace, but if the system is > swapping like mad, can we still get a critical > response if this remains in userspace fully? Just make sure the program isn't swapped out. > Someone mentioned we should use a kernel thread(s) to > handle stopping all I/O so we can safely park heads. That's madness, we can't add a kernel thread for every single little silly thing. You don't need to stop any io, you just want to make sure that your park request gets issued right after the current io has finished. -- Jens Axboe - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
Re: IBM HDAPS things are looking up (was: Re: [Hdaps-devel] Re: [ltp] IBM HDAPS Someone interested? (Accelerometer))
We could put it in userspace, but if the system is swapping like mad, can we still get a critical response if this remains in userspace fully? Someone mentioned we should use a kernel thread(s) to handle stopping all I/O so we can safely park heads. Shawn. --- Jens Axboe <[EMAIL PROTECTED]> wrote: > On Mon, Jul 04 2005, Lenz Grimmer wrote: > > > I'll be working on adding sysfs stuff to it > tomorrow so it's generally > > > useful (at least for monitoring things - not yet > for parking disk > > > heads). > > > > Maybe there is some kind of all-purpose ATA > command that instructs the > > disk drive to park the heads? Jens, could you give > us a hint on how a > > userspace application would do that? > > Dunno if there's something that explicitly only > parks the head, the best > option is probably to issue a STANDBY_NOW command. > You can test this > with hdparm -y. > > Generel observation on this driver - why isn't it > just contained in user > space? You need to do the monitoring and sending of > ide commands from > there anyways, I don't see the point of putting it > in the kernel. > > -- > Jens Axboe > > > > --- > SF.Net email is sponsored by: Discover Easy Linux > Migration Strategies > from IBM. Find simple to follow Roadmaps, > straightforward articles, > informative Webcasts and more! Get everything you > need to get up to > speed, fast. > http://ads.osdn.com/?ad_id=7477_id=16492=click > ___ > Hdaps-devel mailing list > [EMAIL PROTECTED] > https://lists.sourceforge.net/lists/listinfo/hdaps-devel > - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
Re: IBM HDAPS things are looking up (was: Re: [Hdaps-devel] Re: [ltp] IBM HDAPS Someone interested? (Accelerometer))
On Mon, Jul 04 2005, Lenz Grimmer wrote:
> -BEGIN PGP SIGNED MESSAGE-
> Hash: SHA1
>
> Hi,
>
> Jens Axboe wrote:
>
> > It isn't too pretty to rely on such unreliable timing anyways. I'm
> > not too crazy about spinning the disk down either, it's useless wear
> > compared to just parking the head.
>
> Fully agreed, and that's the approach the IBM Windows driver seems to
> take - you just hear the disk park its head when the sensor kicks in
> (you can hear it) - the disk does not spin down when this happens.
>
> Could this be some reserved ATA command that only works with certain#
> drives?
Perhaps the IDLE or IDLEIMMEDIATE commands imply a head parking, that
would make sense. As you say, you can hear a drive parking its head.
Here's a test case, it doesn't sound like it's parking the hard here.
#include
#include
#include
#include
#include
int main(int argc, char *argv[])
{
char cmd[4] = { 0xe1, 0, 0, 0 };
int fd;
if (argc < 2) {
printf("%s \n", argv[0]);
return 1;
}
fd = open(argv[1], O_RDONLY);
if (fd == -1) {
perror("open");
return 1;
}
if (ioctl(fd, HDIO_DRIVE_CMD, cmd))
perror("ioctl");
close(fd);
return 0;
}
--
Jens Axboe
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to [EMAIL PROTECTED]
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
Re: IBM HDAPS things are looking up (was: Re: [Hdaps-devel] Re: [ltp] IBM HDAPS Someone interested? (Accelerometer))
On 7/4/05, Pekka Enberg <[EMAIL PROTECTED]> wrote:
> Hi Jesper,
>
> On 7/4/05, Jesper Juhl <[EMAIL PROTECTED]> wrote:
> > static int
> > ibm_hdaps_open(struct inode *inode, struct file *filp)
> > {
> > printk("%s() start\n", __func__);
> > if (!atomic_dec_and_test(_hdaps_available)) {
> > printk("%s() busy\n", __func__);
> > atomic_inc(_hdaps_available);
> > return -EBUSY;
> > }
> > printk("%s() good\n", __func__);
> >
> > filp->private_data = kmalloc(sizeof(struct hdaps_accel_data),
> > GFP_KERNEL);
>
> You seem to be leaking private_data.
>
Thanks. It still needs a lot of work (as can also be seen from all the
nice feedback in this thread).
I just woke up and I'll start looking at the mails people have posted
in a few hours.
--
Jesper Juhl <[EMAIL PROTECTED]>
Don't top-post http://www.catb.org/~esr/jargon/html/T/top-post.html
Plain text mails only, please http://www.expita.com/nomime.html
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to [EMAIL PROTECTED]
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
Re: IBM HDAPS things are looking up (was: Re: [Hdaps-devel] Re: [ltp] IBM HDAPS Someone interested? (Accelerometer))
Hi Jesper,
On 7/4/05, Jesper Juhl <[EMAIL PROTECTED]> wrote:
> static int
> ibm_hdaps_open(struct inode *inode, struct file *filp)
> {
> printk("%s() start\n", __func__);
> if (!atomic_dec_and_test(_hdaps_available)) {
> printk("%s() busy\n", __func__);
> atomic_inc(_hdaps_available);
> return -EBUSY;
> }
> printk("%s() good\n", __func__);
>
> filp->private_data = kmalloc(sizeof(struct hdaps_accel_data),
> GFP_KERNEL);
You seem to be leaking private_data.
Pekka
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to [EMAIL PROTECTED]
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
Re: IBM HDAPS things are looking up (was: Re: [Hdaps-devel] Re: [ltp] IBM HDAPS Someone interested? (Accelerometer))
-BEGIN PGP SIGNED MESSAGE- Hash: SHA1 Hi, Jens Axboe wrote: > It isn't too pretty to rely on such unreliable timing anyways. I'm > not too crazy about spinning the disk down either, it's useless wear > compared to just parking the head. Fully agreed, and that's the approach the IBM Windows driver seems to take - you just hear the disk park its head when the sensor kicks in (you can hear it) - the disk does not spin down when this happens. Could this be some reserved ATA command that only works with certain# drives? Bye, LenZ - -- - -- Lenz Grimmer <[EMAIL PROTECTED]> -o) [ICQ: 160767607 | Jabber: [EMAIL PROTECTED]/\\ http://www.lenzg.org/ V_V -BEGIN PGP SIGNATURE- Version: GnuPG v1.4.0 (GNU/Linux) Comment: Using GnuPG with Thunderbird - http://enigmail.mozdev.org iD8DBQFCyRBySVDhKrJykfIRAkM+AJ9UDbO8JU48UcEgVE2Kf35X1f4PjgCfaNPx xEHnSU5BagtmC02nwGx66F4= =BDfq -END PGP SIGNATURE- - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
Re: IBM HDAPS things are looking up (was: Re: [Hdaps-devel] Re: [ltp] IBM HDAPS Someone interested? (Accelerometer))
-BEGIN PGP SIGNED MESSAGE- Hash: SHA1 Hi Jens, thanks for your quick reply! Jens Axboe wrote: > Dunno if there's something that explicitly only parks the head, the > best option is probably to issue a STANDBY_NOW command. You can test > this with hdparm -y. Thanks for the hint! As others already mentioned, STANDBY_NOW may not be the best option in this case - we shall investigate what the IBM Windows driver is using here. > Generel observation on this driver - why isn't it just contained in > user space? You need to do the monitoring and sending of ide commands > from there anyways, I don't see the point of putting it in the > kernel. Sorry, my comments may have been misleading - I agree that this should be better done in userspace. The kernel module just reads out the accelerometer, a user space app could then interpret the values and take appropriate action (e.g. parking the hdd head). This allows other apps to make use of these acceleratometer values as well (think SDL for games). Bye, LenZ - -- - -- Lenz Grimmer <[EMAIL PROTECTED]> -o) [ICQ: 160767607 | Jabber: [EMAIL PROTECTED]/\\ http://www.lenzg.org/ V_V -BEGIN PGP SIGNATURE- Version: GnuPG v1.4.0 (GNU/Linux) Comment: Using GnuPG with Thunderbird - http://enigmail.mozdev.org iD8DBQFCyQ9XSVDhKrJykfIRAktdAJ9eltvz0sjTfKT7oVgqikGFEYJwHQCfdr7n b7M02yR0n2UrUFLL03xA804= =MHtj -END PGP SIGNATURE- - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
Re: IBM HDAPS things are looking up (was: Re: [Hdaps-devel] Re: [ltp] IBM HDAPS Someone interested? (Accelerometer))
On 185, 07 04, 2005 at 08:00:12AM +0200, Lenz Grimmer wrote: > -BEGIN PGP SIGNED MESSAGE- > Hash: SHA1 > > Hi Jesper, > > Jesper Juhl wrote: > > > I just had a nice chat with the guys there and we got some > > improvements made by them and us merged up. And I /think/ we agreed > > that I'll maintain the driver, merge fixes/features etc and eventually > > try to get it merged. > > Thanks a ton! I am really excited to see that you guys made so much > progress over the past few days! Of course, I immediately had to give it > a try :) > > > Currently the driver loads, initializes the accelerometer and we can > > read data from it. > > And here is a first support request - the kernel module does not load > for me :( > > I have a Thinkpad T42, running SUSE Linux 9.3 (Kernel 2.6.11 with SUSE > patches). The APS works on Windows, so I know the accelerometer is there. > > I have downloaded the sources from your site mentioned below, ran "make" > and "make install". Then I created the /dev/hdaps0 device node by > running "mknod hdaps0 c 228 0". (I picked this out of another message in > the discussion) > > However, running "modprobe ibm_hdaps" only yields an error: > > FATAL: Error inserting ibm_hdaps > (/lib/modules/2.6.11.4-21.7-default/kernel/drivers/misc/ibm_hdaps.ko): > No such device or address > > In /var/log/messages, I only see: > > Jul 4 07:17:20 metis kernel: ibm_hdaps: unsupported module, tainting > kernel. > Jul 4 07:17:20 metis kernel: init 1 50239260 Looks like io port region is already busy. > (The last number differs every time I load the module) > Passing "debug=1" did not really reveal any more info. How could I > provide you with more detail? Run cat /proc/ioports > I also tried to load Henrik's module, but it also spits out an error > "failed to allocate I/O", then a long number of "latch_check" lines and > "initialize() ret: -5". > > Maybe the accelerometer on the T42 uses a different port range? Or could > it be that some other kernel module is blocking this I/O range? I have > no clue... > > > I'll be working on adding sysfs stuff to it tomorrow so it's generally > > useful (at least for monitoring things - not yet for parking disk > > heads). > > Maybe there is some kind of all-purpose ATA command that instructs the > disk drive to park the heads? Jens, could you give us a hint on how a > userspace application would do that? > > > Once I've got the sysfs stuff sorted I'll publish a new version. > > > > The most recent version of the driver is currently at > > http://lemonshop.dk/ibm_hpaps/ (note: this is most likely not going to > > be the permanent home of this driver, but it's where it lives for > > now). > > Should we try to move the sources over to the hdaps.sf.net CVS tree? > Even though I am more a Subversion fan, having at least some kind of > version control would make it easier for others to participate and make > sure we can send patches against the latest version. > > > Patches are welcome at [EMAIL PROTECTED] > > Attached please find a diff against ibm_hdaps.c I found on the URL above > - - I moved some stuff to a separate header file (attached) and added > printing out the driver name and copyright during module initialization > (taken from Henrik's files). I also added an "uninstall" target to the > Makefile. > > I hope you find it useful! > > Bye, > LenZ > - -- > - -- > Lenz Grimmer <[EMAIL PROTECTED]> -o) > [ICQ: 160767607 | Jabber: [EMAIL PROTECTED]/\\ > http://www.lenzg.org/ V_V > -BEGIN PGP SIGNATURE- > Version: GnuPG v1.4.0 (GNU/Linux) > Comment: Using GnuPG with Thunderbird - http://enigmail.mozdev.org > > iD8DBQFCyNBpSVDhKrJykfIRAmLjAJwI1xaQEeW98M4yLVema2u+b9gX9wCfSufx > BuNm1Kcfk48FAn1e3pMa27M= > =yy24 > -END PGP SIGNATURE- > --- ibm_hdaps.c.org 2005-07-04 07:33:17.0 +0200 > +++ ibm_hdaps.c 2005-07-04 07:42:58.0 +0200 > @@ -34,31 +34,18 @@ > #include > #include > #include > +#include "ibm_hdaps.h" > > > +#define DRV_NAME"ibm_hdaps" > +#define DRV_DESCRIPTION "IBM ThinkPad Accelerometer driver" > +#define DRV_COPYRIGHT"Copyright (c) 2005 Jesper Juhl <[EMAIL > PROTECTED]>" > +#define DRV_VERSION "0.2" > > -#define HDAPS_LOW_PORT 0x1600 /* first port used by accelerometer */ > -#define HDAPS_NR_PORTS 0x30/* nr of ports total - 0x1600 through > 0x162f */ > - > -#define STATE_STALE 0x00/* accelerometer data is stale */ > -#define STATE_FRESH 0x50/* accelerometer data fresh fresh */ > - > -#define REFRESH_ASYNC0x00/* do asynchronous refresh */ > -#define REFRESH_SYNC 0x01/* do synchronous refresh */ > - > -/* > - * where to find the various accelerometer data > - * these map to the members of struct hdaps_accel_data > - */ > -#define HDAPS_PORT_STATE 0x1611 >
Re: IBM HDAPS things are looking up (was: Re: [Hdaps-devel] Re: [ltp] IBM HDAPS Someone interested? (Accelerometer))
On Mon, Jul 04 2005, Arjan van de Ven wrote: > > > > > Yeah, that likely needs a little help from the ide driver. If you force > > a spindown, you will effectively have parked the head for as long as the > > spindown + spinup takes. That could turn out to be enough, it will take > > more than 1-2 seconds anyways. > > I doubt it; laptop disks seem to be optimized for spinning up/down fast > (for powersaving reasons) so while for normal disks I'd agree with you, > for laptop disks I'm far less sure. It isn't too pretty to rely on such unreliable timing anyways. I'm not too crazy about spinning the disk down either, it's useless wear compared to just parking the head. -- Jens Axboe - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
Re: IBM HDAPS things are looking up (was: Re: [Hdaps-devel] Re: [ltp] IBM HDAPS Someone interested? (Accelerometer))
> > Yeah, that likely needs a little help from the ide driver. If you force > a spindown, you will effectively have parked the head for as long as the > spindown + spinup takes. That could turn out to be enough, it will take > more than 1-2 seconds anyways. I doubt it; laptop disks seem to be optimized for spinning up/down fast (for powersaving reasons) so while for normal disks I'd agree with you, for laptop disks I'm far less sure. - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
Re: IBM HDAPS things are looking up (was: Re: [Hdaps-devel] Re: [ltp] IBM HDAPS Someone interested? (Accelerometer))
Yeah, that likely needs a little help from the ide driver. If you force a spindown, you will effectively have parked the head for as long as the spindown + spinup takes. That could turn out to be enough, it will take more than 1-2 seconds anyways. I doubt it; laptop disks seem to be optimized for spinning up/down fast (for powersaving reasons) so while for normal disks I'd agree with you, for laptop disks I'm far less sure. - To unsubscribe from this list: send the line unsubscribe linux-kernel in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
Re: IBM HDAPS things are looking up (was: Re: [Hdaps-devel] Re: [ltp] IBM HDAPS Someone interested? (Accelerometer))
On Mon, Jul 04 2005, Arjan van de Ven wrote: Yeah, that likely needs a little help from the ide driver. If you force a spindown, you will effectively have parked the head for as long as the spindown + spinup takes. That could turn out to be enough, it will take more than 1-2 seconds anyways. I doubt it; laptop disks seem to be optimized for spinning up/down fast (for powersaving reasons) so while for normal disks I'd agree with you, for laptop disks I'm far less sure. It isn't too pretty to rely on such unreliable timing anyways. I'm not too crazy about spinning the disk down either, it's useless wear compared to just parking the head. -- Jens Axboe - To unsubscribe from this list: send the line unsubscribe linux-kernel in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
Re: IBM HDAPS things are looking up (was: Re: [Hdaps-devel] Re: [ltp] IBM HDAPS Someone interested? (Accelerometer))
On 185, 07 04, 2005 at 08:00:12AM +0200, Lenz Grimmer wrote: -BEGIN PGP SIGNED MESSAGE- Hash: SHA1 Hi Jesper, Jesper Juhl wrote: I just had a nice chat with the guys there and we got some improvements made by them and us merged up. And I /think/ we agreed that I'll maintain the driver, merge fixes/features etc and eventually try to get it merged. Thanks a ton! I am really excited to see that you guys made so much progress over the past few days! Of course, I immediately had to give it a try :) Currently the driver loads, initializes the accelerometer and we can read data from it. And here is a first support request - the kernel module does not load for me :( I have a Thinkpad T42, running SUSE Linux 9.3 (Kernel 2.6.11 with SUSE patches). The APS works on Windows, so I know the accelerometer is there. I have downloaded the sources from your site mentioned below, ran make and make install. Then I created the /dev/hdaps0 device node by running mknod hdaps0 c 228 0. (I picked this out of another message in the discussion) However, running modprobe ibm_hdaps only yields an error: FATAL: Error inserting ibm_hdaps (/lib/modules/2.6.11.4-21.7-default/kernel/drivers/misc/ibm_hdaps.ko): No such device or address In /var/log/messages, I only see: Jul 4 07:17:20 metis kernel: ibm_hdaps: unsupported module, tainting kernel. Jul 4 07:17:20 metis kernel: init 1 50239260 Looks like io port region is already busy. (The last number differs every time I load the module) Passing debug=1 did not really reveal any more info. How could I provide you with more detail? Run cat /proc/ioports I also tried to load Henrik's module, but it also spits out an error failed to allocate I/O, then a long number of latch_check lines and initialize() ret: -5. Maybe the accelerometer on the T42 uses a different port range? Or could it be that some other kernel module is blocking this I/O range? I have no clue... I'll be working on adding sysfs stuff to it tomorrow so it's generally useful (at least for monitoring things - not yet for parking disk heads). Maybe there is some kind of all-purpose ATA command that instructs the disk drive to park the heads? Jens, could you give us a hint on how a userspace application would do that? Once I've got the sysfs stuff sorted I'll publish a new version. The most recent version of the driver is currently at http://lemonshop.dk/ibm_hpaps/ (note: this is most likely not going to be the permanent home of this driver, but it's where it lives for now). Should we try to move the sources over to the hdaps.sf.net CVS tree? Even though I am more a Subversion fan, having at least some kind of version control would make it easier for others to participate and make sure we can send patches against the latest version. Patches are welcome at [EMAIL PROTECTED] Attached please find a diff against ibm_hdaps.c I found on the URL above - - I moved some stuff to a separate header file (attached) and added printing out the driver name and copyright during module initialization (taken from Henrik's files). I also added an uninstall target to the Makefile. I hope you find it useful! Bye, LenZ - -- - -- Lenz Grimmer [EMAIL PROTECTED] -o) [ICQ: 160767607 | Jabber: [EMAIL PROTECTED]/\\ http://www.lenzg.org/ V_V -BEGIN PGP SIGNATURE- Version: GnuPG v1.4.0 (GNU/Linux) Comment: Using GnuPG with Thunderbird - http://enigmail.mozdev.org iD8DBQFCyNBpSVDhKrJykfIRAmLjAJwI1xaQEeW98M4yLVema2u+b9gX9wCfSufx BuNm1Kcfk48FAn1e3pMa27M= =yy24 -END PGP SIGNATURE- --- ibm_hdaps.c.org 2005-07-04 07:33:17.0 +0200 +++ ibm_hdaps.c 2005-07-04 07:42:58.0 +0200 @@ -34,31 +34,18 @@ #include linux/delay.h #include asm/io.h #include asm/uaccess.h +#include ibm_hdaps.h +#define DRV_NAMEibm_hdaps +#define DRV_DESCRIPTION IBM ThinkPad Accelerometer driver +#define DRV_COPYRIGHTCopyright (c) 2005 Jesper Juhl [EMAIL PROTECTED] +#define DRV_VERSION 0.2 -#define HDAPS_LOW_PORT 0x1600 /* first port used by accelerometer */ -#define HDAPS_NR_PORTS 0x30/* nr of ports total - 0x1600 through 0x162f */ - -#define STATE_STALE 0x00/* accelerometer data is stale */ -#define STATE_FRESH 0x50/* accelerometer data fresh fresh */ - -#define REFRESH_ASYNC0x00/* do asynchronous refresh */ -#define REFRESH_SYNC 0x01/* do synchronous refresh */ - -/* - * where to find the various accelerometer data - * these map to the members of struct hdaps_accel_data - */ -#define HDAPS_PORT_STATE 0x1611 -#define HDAPS_PORT_XACCEL 0x1612 -#define HDAPS_PORT_YACCEL0x1614 -#define HDAPS_PORT_TEMP 0x1616 -#define
Re: IBM HDAPS things are looking up (was: Re: [Hdaps-devel] Re: [ltp] IBM HDAPS Someone interested? (Accelerometer))
-BEGIN PGP SIGNED MESSAGE- Hash: SHA1 Hi Jens, thanks for your quick reply! Jens Axboe wrote: Dunno if there's something that explicitly only parks the head, the best option is probably to issue a STANDBY_NOW command. You can test this with hdparm -y. Thanks for the hint! As others already mentioned, STANDBY_NOW may not be the best option in this case - we shall investigate what the IBM Windows driver is using here. Generel observation on this driver - why isn't it just contained in user space? You need to do the monitoring and sending of ide commands from there anyways, I don't see the point of putting it in the kernel. Sorry, my comments may have been misleading - I agree that this should be better done in userspace. The kernel module just reads out the accelerometer, a user space app could then interpret the values and take appropriate action (e.g. parking the hdd head). This allows other apps to make use of these acceleratometer values as well (think SDL for games). Bye, LenZ - -- - -- Lenz Grimmer [EMAIL PROTECTED] -o) [ICQ: 160767607 | Jabber: [EMAIL PROTECTED]/\\ http://www.lenzg.org/ V_V -BEGIN PGP SIGNATURE- Version: GnuPG v1.4.0 (GNU/Linux) Comment: Using GnuPG with Thunderbird - http://enigmail.mozdev.org iD8DBQFCyQ9XSVDhKrJykfIRAktdAJ9eltvz0sjTfKT7oVgqikGFEYJwHQCfdr7n b7M02yR0n2UrUFLL03xA804= =MHtj -END PGP SIGNATURE- - To unsubscribe from this list: send the line unsubscribe linux-kernel in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
Re: IBM HDAPS things are looking up (was: Re: [Hdaps-devel] Re: [ltp] IBM HDAPS Someone interested? (Accelerometer))
-BEGIN PGP SIGNED MESSAGE- Hash: SHA1 Hi, Jens Axboe wrote: It isn't too pretty to rely on such unreliable timing anyways. I'm not too crazy about spinning the disk down either, it's useless wear compared to just parking the head. Fully agreed, and that's the approach the IBM Windows driver seems to take - you just hear the disk park its head when the sensor kicks in (you can hear it) - the disk does not spin down when this happens. Could this be some reserved ATA command that only works with certain# drives? Bye, LenZ - -- - -- Lenz Grimmer [EMAIL PROTECTED] -o) [ICQ: 160767607 | Jabber: [EMAIL PROTECTED]/\\ http://www.lenzg.org/ V_V -BEGIN PGP SIGNATURE- Version: GnuPG v1.4.0 (GNU/Linux) Comment: Using GnuPG with Thunderbird - http://enigmail.mozdev.org iD8DBQFCyRBySVDhKrJykfIRAkM+AJ9UDbO8JU48UcEgVE2Kf35X1f4PjgCfaNPx xEHnSU5BagtmC02nwGx66F4= =BDfq -END PGP SIGNATURE- - To unsubscribe from this list: send the line unsubscribe linux-kernel in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
Re: IBM HDAPS things are looking up (was: Re: [Hdaps-devel] Re: [ltp] IBM HDAPS Someone interested? (Accelerometer))
Hi Jesper,
On 7/4/05, Jesper Juhl [EMAIL PROTECTED] wrote:
static int
ibm_hdaps_open(struct inode *inode, struct file *filp)
{
printk(%s() start\n, __func__);
if (!atomic_dec_and_test(ibm_hdaps_available)) {
printk(%s() busy\n, __func__);
atomic_inc(ibm_hdaps_available);
return -EBUSY;
}
printk(%s() good\n, __func__);
filp-private_data = kmalloc(sizeof(struct hdaps_accel_data),
GFP_KERNEL);
You seem to be leaking private_data.
Pekka
-
To unsubscribe from this list: send the line unsubscribe linux-kernel in
the body of a message to [EMAIL PROTECTED]
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
Re: IBM HDAPS things are looking up (was: Re: [Hdaps-devel] Re: [ltp] IBM HDAPS Someone interested? (Accelerometer))
On Mon, Jul 04 2005, Lenz Grimmer wrote:
-BEGIN PGP SIGNED MESSAGE-
Hash: SHA1
Hi,
Jens Axboe wrote:
It isn't too pretty to rely on such unreliable timing anyways. I'm
not too crazy about spinning the disk down either, it's useless wear
compared to just parking the head.
Fully agreed, and that's the approach the IBM Windows driver seems to
take - you just hear the disk park its head when the sensor kicks in
(you can hear it) - the disk does not spin down when this happens.
Could this be some reserved ATA command that only works with certain#
drives?
Perhaps the IDLE or IDLEIMMEDIATE commands imply a head parking, that
would make sense. As you say, you can hear a drive parking its head.
Here's a test case, it doesn't sound like it's parking the hard here.
#include stdio.h
#include unistd.h
#include fcntl.h
#include sys/ioctl.h
#include linux/hdreg.h
int main(int argc, char *argv[])
{
char cmd[4] = { 0xe1, 0, 0, 0 };
int fd;
if (argc 2) {
printf(%s dev\n, argv[0]);
return 1;
}
fd = open(argv[1], O_RDONLY);
if (fd == -1) {
perror(open);
return 1;
}
if (ioctl(fd, HDIO_DRIVE_CMD, cmd))
perror(ioctl);
close(fd);
return 0;
}
--
Jens Axboe
-
To unsubscribe from this list: send the line unsubscribe linux-kernel in
the body of a message to [EMAIL PROTECTED]
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
Re: IBM HDAPS things are looking up (was: Re: [Hdaps-devel] Re: [ltp] IBM HDAPS Someone interested? (Accelerometer))
On 7/4/05, Pekka Enberg [EMAIL PROTECTED] wrote:
Hi Jesper,
On 7/4/05, Jesper Juhl [EMAIL PROTECTED] wrote:
static int
ibm_hdaps_open(struct inode *inode, struct file *filp)
{
printk(%s() start\n, __func__);
if (!atomic_dec_and_test(ibm_hdaps_available)) {
printk(%s() busy\n, __func__);
atomic_inc(ibm_hdaps_available);
return -EBUSY;
}
printk(%s() good\n, __func__);
filp-private_data = kmalloc(sizeof(struct hdaps_accel_data),
GFP_KERNEL);
You seem to be leaking private_data.
Thanks. It still needs a lot of work (as can also be seen from all the
nice feedback in this thread).
I just woke up and I'll start looking at the mails people have posted
in a few hours.
--
Jesper Juhl [EMAIL PROTECTED]
Don't top-post http://www.catb.org/~esr/jargon/html/T/top-post.html
Plain text mails only, please http://www.expita.com/nomime.html
-
To unsubscribe from this list: send the line unsubscribe linux-kernel in
the body of a message to [EMAIL PROTECTED]
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
Re: IBM HDAPS things are looking up (was: Re: [Hdaps-devel] Re: [ltp] IBM HDAPS Someone interested? (Accelerometer))
We could put it in userspace, but if the system is swapping like mad, can we still get a critical response if this remains in userspace fully? Someone mentioned we should use a kernel thread(s) to handle stopping all I/O so we can safely park heads. Shawn. --- Jens Axboe [EMAIL PROTECTED] wrote: On Mon, Jul 04 2005, Lenz Grimmer wrote: I'll be working on adding sysfs stuff to it tomorrow so it's generally useful (at least for monitoring things - not yet for parking disk heads). Maybe there is some kind of all-purpose ATA command that instructs the disk drive to park the heads? Jens, could you give us a hint on how a userspace application would do that? Dunno if there's something that explicitly only parks the head, the best option is probably to issue a STANDBY_NOW command. You can test this with hdparm -y. Generel observation on this driver - why isn't it just contained in user space? You need to do the monitoring and sending of ide commands from there anyways, I don't see the point of putting it in the kernel. -- Jens Axboe --- SF.Net email is sponsored by: Discover Easy Linux Migration Strategies from IBM. Find simple to follow Roadmaps, straightforward articles, informative Webcasts and more! Get everything you need to get up to speed, fast. http://ads.osdn.com/?ad_id=7477alloc_id=16492op=click ___ Hdaps-devel mailing list [EMAIL PROTECTED] https://lists.sourceforge.net/lists/listinfo/hdaps-devel - To unsubscribe from this list: send the line unsubscribe linux-kernel in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
Re: IBM HDAPS things are looking up (was: Re: [Hdaps-devel] Re: [ltp] IBM HDAPS Someone interested? (Accelerometer))
(don't top post!) On Mon, Jul 04 2005, Shawn Starr wrote: We could put it in userspace, but if the system is swapping like mad, can we still get a critical response if this remains in userspace fully? Just make sure the program isn't swapped out. Someone mentioned we should use a kernel thread(s) to handle stopping all I/O so we can safely park heads. That's madness, we can't add a kernel thread for every single little silly thing. You don't need to stop any io, you just want to make sure that your park request gets issued right after the current io has finished. -- Jens Axboe - To unsubscribe from this list: send the line unsubscribe linux-kernel in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
Re: IBM HDAPS things are looking up (was: Re: [Hdaps-devel] Re: [ltp] IBM HDAPS Someone interested? (Accelerometer))
On 7/4/05, Jens Axboe [EMAIL PROTECTED] wrote: Generel observation on this driver - why isn't it just contained in user space? You need to do the monitoring and sending of ide commands from there anyways, I don't see the point of putting it in the kernel. Can't the accelerometer be used as an input device in addition to just being a about to fall detector? I seem to remember games where the the input method involved tilting the device in the direction you want a marble to roll or something like that. - To unsubscribe from this list: send the line unsubscribe linux-kernel in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
Re: IBM HDAPS things are looking up (was: Re: [Hdaps-devel] Re: [ltp] IBM HDAPS Someone interested? (Accelerometer))
-BEGIN PGP SIGNED MESSAGE- Hash: SHA1 Hi, Aaron Cohen wrote: Can't the accelerometer be used as an input device in addition to just being a about to fall detector? Yes, it can - the kernel driver just prints the data taken from the accelerometer. It's up to another application to make sense out of this. One purpose would be the mentioned fall detector that would then instruct the disk drive to part its head. I seem to remember games where the the input method involved tilting the device in the direction you want a marble to roll or something like that. Correct, that would be one option. Mark Smith (they IBM guy who wrote up the information required to write the kernel module) actually mentioned he had patched SDL to support the accelerometer as an input device. Playing Neverball by tilting your Laptop sounds like fun :) Bye, LenZ - -- - -- Lenz Grimmer [EMAIL PROTECTED] -o) [ICQ: 160767607 | Jabber: [EMAIL PROTECTED]/\\ http://www.lenzg.org/ V_V -BEGIN PGP SIGNATURE- Version: GnuPG v1.4.0 (GNU/Linux) Comment: Using GnuPG with Thunderbird - http://enigmail.mozdev.org iD8DBQFCyY20SVDhKrJykfIRAjo/AJ0dyN0GXE7U5H3+updjuMKALoHlXQCdExrA FwgCv2ELKCc9cC0M47E5B+w= =pigJ -END PGP SIGNATURE- - To unsubscribe from this list: send the line unsubscribe linux-kernel in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
Re: IBM HDAPS things are looking up (was: Re: [Hdaps-devel] Re: [ltp] IBM HDAPS Someone interested? (Accelerometer))
Hi! This is exactly what I said. Use hdparm to make the HD park inmediatelly. I did send the email to the HDPARM developer, but he never replied. I asked him what would be the best way to make the HD park with no exception and then let it come back 5 or 10 seconds later. IIRC, you don't have to do anything to wake up the drive after a STANDBYNOW command, if you want to be on the safe side you just issue an IDLEIMMEDIATE. So your code will look something like: the problem for this will be that this app will also want to prevent ANY io going to the disk for a few seconds. I mean, what use is parking the head if you notice the laptop falling, when the kernel submits IO to it and wakes it up again before it hits the ground :) Yeah, that likely needs a little help from the ide driver. If you force a spindown, you will effectively have parked the head for as long as the spindown + spinup takes. That could turn out to be enough, it will take more than 1-2 seconds anyways. Actually, spin disk down and keep it down would be nice for other reasons. Taking computer for a jog playing mp3s from ramdisk is something I'd like to do... Pavel -- 64 bytes from 195.113.31.123: icmp_seq=28 ttl=51 time=448769.1 ms - To unsubscribe from this list: send the line unsubscribe linux-kernel in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
Re: IBM HDAPS things are looking up (was: Re: [Hdaps-devel] Re: [ltp] IBM HDAPS Someone interested? (Accelerometer))
Hi! BTW, we are on irc.freenode.org in #hdaps If anyone is interested. .Alejandro I just had a nice chat with the guys there and we got some improvements made by them and us merged up. And I /think/ we agreed that I'll maintain the driver, merge fixes/features etc and eventually try to get it merged. Currently the driver loads, initializes the accelerometer and we can read data from it. I'll be working on adding sysfs stuff to it tomorrow so it's generally useful (at least for monitoring things - not yet for parking disk Actually you should probably implement it as an input device; no need to mess with sysfs. drivers/input/accell ? Pavel -- 64 bytes from 195.113.31.123: icmp_seq=28 ttl=51 time=448769.1 ms - To unsubscribe from this list: send the line unsubscribe linux-kernel in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
Re: IBM HDAPS things are looking up (was: Re: [Hdaps-devel] Re: [ltp] IBM HDAPS Someone interested? (Accelerometer))
Pavel Machek wrote: Actually, spin disk down and keep it down would be nice for other reasons. Taking computer for a jog playing mp3s from ramdisk is something I'd like to do... Pavel This is exactly what I wanted to do. hdparm suspend which would send things to cache or buffer and then copy or get files only when needed. I just hope is fast enough, but we could trigger this with tilting or vibration and then something heavier when we find a free fall. This driver does not exactly has to behave like Windows. It can be better. We always make things better. .Alejandro - To unsubscribe from this list: send the line unsubscribe linux-kernel in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
