how to see 14 disks
For years I've been using hardware raid on compaq smart2 cards to handle hosts with 10-20 disks. The firmware presents each volume as a device to the OS so there's usually only a couple disks from linux's point of view. Now I have an aic7xxx card hooked straight up to an array with 14 disks in it. Linux only sees the first 8. There's apparently only 128 device nodes available for SCSI and all the possible partitions on each disk is allowing for only my first 8 disks. It seems that you might be able to re-create the dev filesystem and only use the device nodes you need. Each of my disks (that I can fdisk anyways) has only a single linux raid autodetect partition on it. The kernel certainly has enough nodes for this setup. Is there a way to get Linux (2.4.18-686-smp kernel) to see all the disks? I don't want some patch like URL:http://www.suse.de/~garloff/linux/scsi-many/ since I run debian kernels. TIA -- Nate Campi http://www.campin.net ignorami: n: The BOFH art of folding problem lusers into representational shapes. msg07504/pgp0.pgp Description: PGP signature
Re: how to see 14 disks
you need to MAKEDEV the extra drive letters I suspect. I ran into this on my scsi array. eg Linux will only see to /dev/sdh by default, to go past this, cd /dev then ./MAKEDEV sdi then reboot. fdisk should now work. regards Thing On Wed, 04 Dec 2002 21:12, Nate Campi wrote: For years I've been using hardware raid on compaq smart2 cards to handle hosts with 10-20 disks. The firmware presents each volume as a device to the OS so there's usually only a couple disks from linux's point of view. Now I have an aic7xxx card hooked straight up to an array with 14 disks in it. Linux only sees the first 8. There's apparently only 128 device nodes available for SCSI and all the possible partitions on each disk is allowing for only my first 8 disks. It seems that you might be able to re-create the dev filesystem and only use the device nodes you need. Each of my disks (that I can fdisk anyways) has only a single linux raid autodetect partition on it. The kernel certainly has enough nodes for this setup. Is there a way to get Linux (2.4.18-686-smp kernel) to see all the disks? I don't want some patch like URL:http://www.suse.de/~garloff/linux/scsi-many/ since I run debian kernels. TIA -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of unsubscribe. Trouble? Contact [EMAIL PROTECTED]
RE: Hardware IDE RAID-1 controller recommandation
Hello Steven, Am 10:09 2002-12-03 +1300 hat Jones, Steven geschrieben: lol, all over the place does not incl NZ. Choice is very limited here in NZ, Id like a 3ware but its try and get someone in the US to sell send it to me at a sane price (international shipping hence no warrantee) or get it from OZ at a horrendious price with again no warrantee. A 4 port 3ware unit is looking $1400AU+ like $700US+then i have to pay Customs off so another 12.5%, way too much. I have heard about stuff like this... A two chanel RAID-1 Controller for two Harddisks for 480 US$ ;-)) For the quarter price I get a used SCSI-RAID-Controller at 'eBay' and for the rest I can buy two NEW IBM IC35L018... Chiao Michelle -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of unsubscribe. Trouble? Contact [EMAIL PROTECTED]
Re: Hardware IDE RAID-1 controller recommandation
Hello Nicolas, Am 08:53 2002-12-03 +0100 hat Nicolas Bougues geschrieben: On Mon, Dec 02, 2002 at 02:22:43AM +, Michelle Konzack wrote: RAID-1 is mirroring. You plan 4- or 8-way mirroring ?? what do you mean with '4- or 8-way' ? I have always two disks parallel (one original and one mirror) Had problems with Software RAID, because the mirror is not bootable and after a shutdown thy Server was not starting. I think, I can use only Hardware RAID. 3ware. Definetly. Although I'm not sure that it supports RAID-1 arrays I have not found a reseller for 3ware in my region... Possible. Depends on the enclosures you use for you drives. Simple IDE racks are OK, as long as they have a switch to turn off power before hotswap. unfortunately no. Is there a RAID-1 Controller which support PIO Mode 4 Drives ? Why on earth would you like to do PIO ? It's awfully slow and ineffective, compared to DMA... Why use 30 Gigs if a 1 Gig does it... It is only one of my administration Servers and the installation is around 95 MByte... ;-)) (apache-ssl, php4, open-ssh) Thanks Michelle -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of unsubscribe. Trouble? Contact [EMAIL PROTECTED]
Re: Hardware IDE RAID-1 controller recommandation
On Wed, Dec 04, 2002 at 11:25:55AM +, Michelle Konzack wrote: On Mon, Dec 02, 2002 at 02:22:43AM +, Michelle Konzack wrote: RAID-1 is mirroring. You plan 4- or 8-way mirroring ?? what do you mean with '4- or 8-way' ? You said in your first post that you need Hardware RAID-1 Controllers for two, four and eight Harddisks. And I was wondering why you would need more than 2 hard disks for mirroring. It can be either : - n-way mirroring : you want to have n identical drives, thus you can live with up to (n-1) failed drives. - some kind of RAID 10, as Russel pointed out, where you would do in fact RAID 1 over multiple RAID 0 arrays. I have always two disks parallel (one original and one mirror) OK, it's clearer now. Had problems with Software RAID, because the mirror is not bootable and after a shutdown thy Server was not starting. I think, I can use only Hardware RAID. Obvisously better. 3ware. Definetly. Although I'm not sure that it supports RAID-1 arrays I have not found a reseller for 3ware in my region... 3ware website lists at least 4 dealers in Germany... Is there a RAID-1 Controller which support PIO Mode 4 Drives ? Why on earth would you like to do PIO ? It's awfully slow and ineffective, compared to DMA... Why use 30 Gigs if a 1 Gig does it... Because 30 Gb drives are cheaper and faster than 1 Gb ones... It is only one of my administration Servers and the installation is around 95 MByte... ;-)) If what you require is only a small drive, and you don't have too much I/O on it (basically serving webpages is OK, SQL is not), did you consider using CF cards ? You can get 256 Mb or more for about 100 Euros. Once you get a cheap CF-to-IDE adapter (something like 20 Euros), you plug them as IDE drives. Very reliable (almost no need for mirroring), almost zero power consumption, no noise, no heat. We use them in several appliance like servers at our customers. The only drawbacks are : - capacity (but as you said, for lots of tasks, that's not a problem) - PIO only. Thus quite slow, about 1 MByte/sec. HTH, -- Nicolas Bougues Axialys Interactive -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of unsubscribe. Trouble? Contact [EMAIL PROTECTED]
in rittardo: USALO
-- -- Sebastián Ezequiel Ovide inline: globito.gif
Re: Logrotate weekly prerotate everyday?
Hello Folks: I call a local script from... /etc/logrotate.d/apache ...in Debian 3.0 to run Analog reports. It is supposed to run once a week, but it runs every day: It seems that the sharedscripts causes this: with sharedscript the prerotate script is always executed (logrotate 3.5.9). In fact if I use nosharedscripts the prerotate is executed only if a log file is actually rotated, but it is executed once for each rotation. It is somewhat understandable, but when the rotation involves several log files, I think it is more desiderable to exec prerotate if and only if one of the log files need rotation? My be... -- Niccolo Rigacci http://www.texnet.it/ -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of unsubscribe. Trouble? Contact [EMAIL PROTECTED]
