Re: [vox-tech] Help with USB Hard drive
chris wrote: > On Fri, 2009-02-20 at 17:53 -0800, Bill Broadley wrote: > >> Er, there is recovery, it's called, er, umm, chkdsk or something?u are I >> think >> there's a fsck.vfat as well. > >chkdsk is only good for saving readable text, if it is .exe you want > back then you are mostly screwed. Really, I don't recall such restrictions, but it's been a very long time so I'll just blame my memory. fsck.vfat mentions fixing quite a few things. > journal roll back will only lose that > data recently added, instead of the entire fs. As mentioned, that's the theory, if everything is perfect. Alas the real world means that block numbers, contents, messages, drivers, etc during an issue (like a power supply failure, brownout) or even just a driver bug. It could even be something as subtle as a vibration. > So basicly, save oven and > make plenty copies. Sure, rsync, backups, version control etc. The way I do things like this is: * Email keep it on server, backup the server (backuppc in my cse) * source code remote subversion server (again backed up by backuppc) * Important non-source code related files rsync The rest... when it dies I consider it house cleaning. > > > > > ___ vox-tech mailing list vox-tech@lists.lugod.org http://lists.lugod.org/mailman/listinfo/vox-tech
Re: [vox-tech] Help with USB Hard drive
On Fri, 2009-02-20 at 17:53 -0800, Bill Broadley wrote: > Er, there is recovery, it's called, er, umm, chkdsk or something?u are I think > there's a fsck.vfat as well. chkdsk is only good for saving readable text, if it is .exe you want back then you are mostly screwed. journal roll back will only lose that data recently added, instead of the entire fs. So basicly, save oven and make plenty copies. -- chris http://digitalatoll.flnet.org/ ___ vox-tech mailing list vox-tech@lists.lugod.org http://lists.lugod.org/mailman/listinfo/vox-tech
Re: [vox-tech] Help with USB Hard drive
Scott Miller wrote: > Hey yeah FAT32 is not journaling either, so if there is every a power > blip or cut of connection there is zero recovery from the file system > (if that is a concern). Er, there is recovery, it's called, er, umm, chkdsk or something? I think there's a fsck.vfat as well. Speaking of which another of my pet peeves/rants. Journals rely on perfectly reliable hardware, drivers, cables, and software. Unfortunately the real world isn't so kind. So the reality is that the periodic fsck gives a much stronger statement of a file systems integrity than a simple journal unroll. Based on my experience the quality of the file system and hardware is hugely more important than the existence or lack of journaling. In fact if anything I've seen more issues with xfs and reiser than I have with ext2 or ext3 (percentage wise, not in absolute terms). I'm not against journals and run ext3 most commonly, but journals are mostly about quick boot/mount times, not safer, and actually they tend to less safe. ___ vox-tech mailing list vox-tech@lists.lugod.org http://lists.lugod.org/mailman/listinfo/vox-tech
Re: [vox-tech] Help with USB Hard drive
Hey yeah FAT32 is not journaling either, so if there is every a power blip or cut of connection there is zero recovery from the file system (if that is a concern). This wikipedia page is one of my favorites, btw: http://en.wikipedia.org/wiki/Comparison_of_file_systems On Fri, Feb 20, 2009 at 11:01, ALLO (Alfredo Lopez De Leon) wrote: > Hi ken and Matthew, > > Awesome info! I'll give it a try :-) > > Ken: does this answer your question? > > Disk /dev/sdf: 1000.2 GB, 1000204886016 bytes > 255 heads, 63 sectors/track, 121601 cylinders > Units = cylinders of 16065 * 512 = 8225280 bytes > > Device Boot Start End Blocks Id System > /dev/sdf1 1 121601 976760001b W95 FAT32 > > By the way I decided to use FAT32 so I can move the drive between several > machines. But.., I may decide to get another one ($150.00 at Fry's final > price) and do the "/dev/disk/by-id/" but with an ext3 partition which > will be much more efficient. > > Thanks!!! > Alfredo > > -Original Message- > From: vox-tech-boun...@lists.lugod.org > [mailto:vox-tech-boun...@lists.lugod.org] On Behalf Of Chanoch (Ken) Bloom > Sent: Friday, February 20, 2009 10:03 AM > To: lugod's technical discussion forum > Subject: Re: [vox-tech] Help with USB Hard drive > > > That's an assumption the operating system makes because most USB drives are > thumb drives and the like, single-user disks that come and go. You can change > that, though. > > Create a rule to identify the device uniquely in udev and to assign it a > permenant device node (I can't tell you exactly how to do this, it will > depend on being able to find something like a serial number that udev can use > to identify it.), then add that device node to /etc/fstab, with appropriate > mount options. > > Just out of curiousity, what's the block size (the size occupied by a 1 byte > file) on a 1 TB fat32 drive? > > --Ken > > -- > Ken (Chanoch) Bloom. PhD candidate. Linguistic Cognition Laboratory. > Department of Computer Science. Illinois Institute of Technology. > http://www.iit.edu/~kbloom1/ > ___ > vox-tech mailing list > vox-tech@lists.lugod.org > http://lists.lugod.org/mailman/listinfo/vox-tech > ___ vox-tech mailing list vox-tech@lists.lugod.org http://lists.lugod.org/mailman/listinfo/vox-tech
Re: [vox-tech] keyboard problems after aptitude upgrade [fixed]
On Wednesday 11 February 2009, Ken Bloom wrote: > Can you tell us what distribution you're running, and tell us what got > upgraded in /var/log/aptitude? > > --Ken Seems like an incomplete upgrade of KDM was to blame. This was fixed by issuing: sudo aptitude install kdm [fixing some dependencies] everything was fine after the upgrade. Thanks for the ideas, Dylan -- Dylan Beaudette Soil Resource Laboratory http://casoilresource.lawr.ucdavis.edu/ University of California at Davis 530.754.7341 ___ vox-tech mailing list vox-tech@lists.lugod.org http://lists.lugod.org/mailman/listinfo/vox-tech
[vox-tech] mysterious messages
Hi, I have seen these messages recently (dmesg): [1434580.283311] INFO: task vol_id:904 blocked for more than 120 seconds. [1434580.283321] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [1434580.283325] vol_idD 85e7f2c5 0 904 1 [1434580.283331]e55db0c0 0086 e5646800 85e7f2c5 00036dde e55db24c c2817fa0 [1434580.283356]e10ee24c 11162f58 91ed 11162f58 e10ee24c 11162f58 c2802678 [1434580.283382]c2817fa0 0245d000 c2802678 c015800f c02b8458 ddbede50 ddbede50 c01568bd [1434580.283410] Call Trace: [1434580.283476] [] sync_page_killable+0x0/0x2a [1434580.283488] [] io_schedule+0x49/0x80 [1434580.283500] [] sync_page+0x33/0x36 [1434580.283505] [] sync_page_killable+0x5/0x2a [1434580.283510] [] __wait_on_bit_lock+0x2a/0x52 [1434580.283523] [] __lock_page_killable+0x51/0x57 [1434580.283538] [] wake_bit_function+0x0/0x3c [1434580.283553] [] generic_file_aio_read+0x331/0x4da [1434580.283611] [] do_sync_read+0xbf/0xfe [1434580.283666] [] autoremove_wake_function+0x0/0x2d [1434580.283681] [] vma_merge+0xd3/0x142 [1434580.283711] [] security_file_permission+0xc/0xd [1434580.283725] [] do_sync_read+0x0/0xfe [1434580.283732] [] vfs_read+0x81/0x11e [1434580.283747] [] sys_read+0x3c/0x63 [1434580.283764] [] sysenter_past_esp+0x78/0xb1 [1434580.283809] === Does this mean anything to anyone on the list? Thanks, Dylan -- Dylan Beaudette Soil Resource Laboratory http://casoilresource.lawr.ucdavis.edu/ University of California at Davis 530.754.7341 ___ vox-tech mailing list vox-tech@lists.lugod.org http://lists.lugod.org/mailman/listinfo/vox-tech
Re: [vox-tech] Help with USB Hard drive
Hi ken and Matthew, Awesome info! I'll give it a try :-) Ken: does this answer your question? Disk /dev/sdf: 1000.2 GB, 1000204886016 bytes 255 heads, 63 sectors/track, 121601 cylinders Units = cylinders of 16065 * 512 = 8225280 bytes Device Boot Start End Blocks Id System /dev/sdf1 1 121601 976760001b W95 FAT32 By the way I decided to use FAT32 so I can move the drive between several machines. But.., I may decide to get another one ($150.00 at Fry's final price) and do the "/dev/disk/by-id/" but with an ext3 partition which will be much more efficient. Thanks!!! Alfredo -Original Message- From: vox-tech-boun...@lists.lugod.org [mailto:vox-tech-boun...@lists.lugod.org] On Behalf Of Chanoch (Ken) Bloom Sent: Friday, February 20, 2009 10:03 AM To: lugod's technical discussion forum Subject: Re: [vox-tech] Help with USB Hard drive That's an assumption the operating system makes because most USB drives are thumb drives and the like, single-user disks that come and go. You can change that, though. Create a rule to identify the device uniquely in udev and to assign it a permenant device node (I can't tell you exactly how to do this, it will depend on being able to find something like a serial number that udev can use to identify it.), then add that device node to /etc/fstab, with appropriate mount options. Just out of curiousity, what's the block size (the size occupied by a 1 byte file) on a 1 TB fat32 drive? --Ken -- Ken (Chanoch) Bloom. PhD candidate. Linguistic Cognition Laboratory. Department of Computer Science. Illinois Institute of Technology. http://www.iit.edu/~kbloom1/ ___ vox-tech mailing list vox-tech@lists.lugod.org http://lists.lugod.org/mailman/listinfo/vox-tech
Re: [vox-tech] Help with USB Hard drive
To add to what Ken said, if you're using udev, you should be able to get a stable device identifier by looking in /dev/disk/by-id. Usually the name there is informative enough to just figure it directly. Recent Fedora and Ubuntu distros have this facility. You can then use /dev/disk/by-id/ in /etc/fstab as Ken suggested. Matt On Fri, Feb 20, 2009 at 11:03 AM, Chanoch (Ken) Bloom wrote: > On Fri, 2009-02-20 at 11:49 -0500, ALLO (Alfredo Lopez De Leon) wrote: > > Hi, > > Thank you very much for all your answers. After testing some of your > > suggestions I "discovered" that It is after all a USB drive and as > > root I have to umount it before logging out so the other users can > > mount it and use it... > > > > Too bad USB drives do not behave like "real attached drives". Well. > > Like the Rolling Stones would say: You can't always get what you want. > > > > Have a nice one! > > > > Alfredo > > That's an assumption the operating system makes because most USB drives > are thumb drives and the like, single-user disks that come and go. You > can change that, though. > > Create a rule to identify the device uniquely in udev and to assign it a > permenant device node (I can't tell you exactly how to do this, it will > depend on being able to find something like a serial number that udev > can use to identify it.), then add that device node to /etc/fstab, with > appropriate mount options. > > Just out of curiousity, what's the block size (the size occupied by a 1 > byte file) on a 1 TB fat32 drive? > > --Ken > > -- > Ken (Chanoch) Bloom. PhD candidate. Linguistic Cognition Laboratory. > Department of Computer Science. Illinois Institute of Technology. > http://www.iit.edu/~kbloom1/ > > > ___ > vox-tech mailing list > vox-tech@lists.lugod.org > http://lists.lugod.org/mailman/listinfo/vox-tech > > ___ vox-tech mailing list vox-tech@lists.lugod.org http://lists.lugod.org/mailman/listinfo/vox-tech
Re: [vox-tech] Help with USB Hard drive
On Fri, 2009-02-20 at 11:49 -0500, ALLO (Alfredo Lopez De Leon) wrote: > Hi, > Thank you very much for all your answers. After testing some of your > suggestions I "discovered" that It is after all a USB drive and as > root I have to umount it before logging out so the other users can > mount it and use it... > > Too bad USB drives do not behave like "real attached drives". Well. > Like the Rolling Stones would say: You can't always get what you want. > > Have a nice one! > > Alfredo That's an assumption the operating system makes because most USB drives are thumb drives and the like, single-user disks that come and go. You can change that, though. Create a rule to identify the device uniquely in udev and to assign it a permenant device node (I can't tell you exactly how to do this, it will depend on being able to find something like a serial number that udev can use to identify it.), then add that device node to /etc/fstab, with appropriate mount options. Just out of curiousity, what's the block size (the size occupied by a 1 byte file) on a 1 TB fat32 drive? --Ken -- Ken (Chanoch) Bloom. PhD candidate. Linguistic Cognition Laboratory. Department of Computer Science. Illinois Institute of Technology. http://www.iit.edu/~kbloom1/ signature.asc Description: This is a digitally signed message part ___ vox-tech mailing list vox-tech@lists.lugod.org http://lists.lugod.org/mailman/listinfo/vox-tech
Re: [vox-tech] Help with USB Hard drive
Hi, Thank you very much for all your answers. After testing some of your suggestions I "discovered" that It is after all a USB drive and as root I have to umount it before logging out so the other users can mount it and use it... Too bad USB drives do not behave like "real attached drives". Well. Like the Rolling Stones would say: You can't always get what you want. Have a nice one! Alfredo -Original Message- From: vox-tech-boun...@lists.lugod.org [mailto:vox-tech-boun...@lists.lugod.org] On Behalf Of Jeffrey Nonken Sent: Thursday, February 19, 2009 7:59 PM To: lugod's technical discussion forum Subject: Re: [vox-tech] Help with USB Hard drive Did you make sure of the permissions on the mounting point? On Feb 19, 2009, at 2:31 PM, ALLO (Alfredo Lopez De Leon) wrote: > Hi, > I have a brand new 1TB USB hard drive formatted by fdisk to FAT32. > My system can see it mount it and umount it. > However, no matter what I do I cannot change the permissions or the > ownership nothing! > The root can write but nobody else can. > I want this drive to be totally accessible to all the users of the > machine (actually a server). > > Is there a way to do this? ___ vox-tech mailing list vox-tech@lists.lugod.org http://lists.lugod.org/mailman/listinfo/vox-tech ___ vox-tech mailing list vox-tech@lists.lugod.org http://lists.lugod.org/mailman/listinfo/vox-tech
