multiple partitions

2000-03-31 Thread Glenn Hudson
Hi, I am hoping someone might help me understand why Linux is usually setup a certain way. Most Linux PC have only one disk drive yet it is recommended that the disk be partitioned into many pieces (home, root, var, swap). I thought this kind of setup would cause excessive disk head movement.

root on RAID

2000-03-31 Thread Glenn Hudson
RedHat Linux 6.1 has the following warning: http://www.redhat.com/support/hardware/intel/61/rh6.1-hcl-i.ld-5.html#ss5.6 5.6 RAID Contr ollers Known Issues: The installation of Red Hat Linux's root partition onto a RAID device is not supported. --

Re: root on RAID

2000-03-31 Thread Theo Van Dinter
On Fri, Mar 31, 2000 at 09:27:59AM +, Glenn Hudson wrote: The installation of Red Hat Linux's root partition onto a RAID device is not supported. Do you know what problems having the root partition on RAID will cause? There are no problems, but the Redhat installer doesn't handle it.

RE: root on RAID

2000-03-31 Thread Gregory Leblanc
-Original Message- From: Theo Van Dinter [mailto:[EMAIL PROTECTED]] Sent: Friday, March 31, 2000 9:46 AM To: Glenn Hudson Cc: Linux-RAID Subject: Re: root on RAID On Fri, Mar 31, 2000 at 09:27:59AM +, Glenn Hudson wrote: The installation of Red Hat Linux's root partition

RE: root on RAID

2000-03-31 Thread Gregory Leblanc
-Original Message- From: Michael [mailto:[EMAIL PROTECTED]] Sent: Friday, March 31, 2000 11:15 AM To: [EMAIL PROTECTED] Subject: RE: root on RAID RedHat Linux 6.1 has the following warning: The installation of Red Hat Linux's root partition onto a RAID device is not

Re: root on RAID

2000-03-31 Thread Theo Van Dinter
On Fri, Mar 31, 2000 at 11:42:01AM -0800, Gregory Leblanc wrote: Mostly because it's (pardon my French) a bitch to recover from. RAID5 and ??? (although still not as easy as a plain mirror), while a stripe of two mirrors (RAID01) is a real pain to recover from. Mostly this applies to ???

Re: Raid5 with two failed disks?

2000-03-31 Thread Marc Haber
On Thu, 30 Mar 2000 10:17:06 -0500, you wrote: On Thu, Mar 30, 2000 at 08:36:52AM -0600, Bill Carlson wrote: I've been thinking about this for a different project, how bad would it be to setup RAID 5 to allow for 2 (or more) failures in an array? Or is this handled under a different class of

Re: Raid5 with two failed disks?

2000-03-31 Thread Marc Haber
On Thu, 30 Mar 2000 09:20:57 +0200, you wrote: At 02:16 30.03.00, you wrote: Hi... I have a Raid5 Array, using 4 IDE HDs. A few days ago, the system hung, no reaction, except ping from the host, nothing to see on the monitor. I rebooted the system and it told me, 2 out of 4 disks were out of

RE: root on RAID

2000-03-31 Thread Gregory Leblanc
-Original Message- From: Theo Van Dinter [mailto:[EMAIL PROTECTED]] Sent: Friday, March 31, 2000 12:06 PM To: Gregory Leblanc Cc: [EMAIL PROTECTED] Subject: Re: root on RAID On Fri, Mar 31, 2000 at 11:42:01AM -0800, Gregory Leblanc wrote: Mostly because it's (pardon my French)

Re: root on RAID

2000-03-31 Thread phil
Use tape! Raid shouldn't replace tapes, they serve different (but sometimes similar) purposes. Phil On Fri, Mar 31, 2000 at 01:38:11PM -0800, Gregory Leblanc wrote: Are you talking about going from RAID to non-RAID? Actually, I'm talking about OS failures, not disk failures. RAID

Disk v. Tape Backup -- Re: root on RAID

2000-03-31 Thread Jeff Hill
I know this is off-topic, but since it was brought up ;) Why not use an old disk, outside of the RAID, for backups? I mount old IDE drives for backups only: tarring the entire system to the backup drive once a week, changed files daily. Seems to work better for me than tapes which always had

RE: Disk v. Tape Backup -- Re: root on RAID

2000-03-31 Thread Gregory Leblanc
Both of my replies are below. -Original Message- From: Jeff Hill [mailto:[EMAIL PROTECTED]] Sent: Friday, March 31, 2000 9:38 AM To: [EMAIL PROTECTED] Cc: Gregory Leblanc; [EMAIL PROTECTED] Subject: Disk v. Tape Backup -- Re: root on RAID I know this is off-topic, but since it

Re: Disk v. Tape Backup -- Re: root on RAID

2000-03-31 Thread phil
On Fri, Mar 31, 2000 at 05:38:27PM +, Jeff Hill wrote: I know this is off-topic, but since it was brought up ;) Why not use an old disk, outside of the RAID, for backups? I mount old IDE drives for backups only: tarring the entire system to the backup drive once a week, changed files

Re: Disk v. Tape Backup -- Re: root on RAID

2000-03-31 Thread Theo Van Dinter
On Fri, Mar 31, 2000 at 02:56:57PM -0800, Gregory Leblanc wrote: un-planned need to restore an entire system from tape. Usually the restores that I do are because Joe User deleted his all important spreadsheet, and NEEDS to have it back. I definately agree that RAID shouldn't (and can't)

Need help with software RAID-1

2000-03-31 Thread Pete Rossi
I am trying to get RAID-1 running with dual SCSI drives. I read the Software-RAID HOWTO and followed the steps outlined there. However.. when I get to the part to run mkraid, it returns the following.. # mkraid /dev/md0 handling MD device /dev/md0 analyzing super-block disk 0:

RE: Disk v. Tape Backup -- Re: root on RAID

2000-03-31 Thread Gregory Leblanc
-Original Message- From: Theo Van Dinter [mailto:[EMAIL PROTECTED]] Sent: Friday, March 31, 2000 3:32 PM To: Gregory Leblanc Cc: 'Jeff Hill'; [EMAIL PROTECTED]; [EMAIL PROTECTED] Subject: Re: Disk v. Tape Backup -- Re: root on RAID On Fri, Mar 31, 2000 at 02:56:57PM -0800,

RE: Need help with software RAID-1

2000-03-31 Thread Gregory Leblanc
-Original Message- From: Pete Rossi [mailto:[EMAIL PROTECTED]] Sent: Friday, March 31, 2000 3:34 PM To: [EMAIL PROTECTED] Subject: Need help with software RAID-1 I am trying to get RAID-1 running with dual SCSI drives. I read the Software-RAID HOWTO and followed the steps

RE: multiple partitions

2000-03-31 Thread Mike Bilow
I think there is rarely a valid reason to split a single disk system into multiple small partitions. In fact, the Multi-Disk HOWTO agrees: In fact, for single physical drives this scheme offers very little gains at all, other than making file growth monitoring easier

RE: multiple partitions

2000-03-31 Thread Michael
/dev/md0/dev/hda1 + /dev/hdc129.7 GBRAID-1 /dev/md1/dev/hda2 + /dev/hdc2 0.3 GBRAID-1 We use /dev/md0 for the root fs and /dev/md1 for swap. Why? Because it takes about 90 minutes to remirror /dev/md0 and only about 2 minutes to remirror /dev/md1. Since we cannot

Re: root on RAID

2000-03-31 Thread Mike Bilow
Probably because the installer does not handle it. I have been working on the Debian end of the same issue, and the problems pretty much amount to this, based on the current potato snapshot: 1. The kernel has to be patched with the newest RAID v0.90 code and rebuilt, and then put onto the first

Re: Disk v. Tape Backup -- Re: root on RAID

2000-03-31 Thread Mike Bilow
Why are you backing up? What if your machine catches fire? What if your office catches fire? What if someone steals your machine? What if your power supply sends mains voltage to every device in the case? -- Mike On Fri, 31 Mar 2000, Jeff Hill wrote: I know this is off-topic, but since

RE: multiple partitions

2000-03-31 Thread Mike Bilow
On Fri, 31 Mar 2000, Michael wrote: /dev/md0/dev/hda1 + /dev/hdc129.7 GBRAID-1 /dev/md1/dev/hda2 + /dev/hdc2 0.3 GBRAID-1 We use /dev/md0 for the root fs and /dev/md1 for swap. Why? Because it takes about 90 minutes to remirror /dev/md0 and only about 2

Re: Promise ATA66

2000-03-31 Thread Agus Budy Wuysang
Ed Schernau wrote: No, it seems that it DOES do hw RAID, but with no battery backup, onboard RAM, etc. It has no onboard RAM so why would it need battery backup? :) BTW, does it do striping (r5/r0) or only mirroring (r1) ? -- +---| Netscape Communicator 4.x |---| Powered by Linux 2.2.x

Re: root on RAID

2000-03-31 Thread Mike Bilow
You are missing that nasty "--absolute-paths" ("-P") switch on tar to preserve the leading slash. It may or may not be what you want. In general, a better approach is to tell tar to make a particular directory the current directory before executing, using the "--directory" ("-C") switch. For

RE: multiple partitions

2000-03-31 Thread Mike Bilow
On Fri, 31 Mar 2000, Michael wrote: /dev/md0/dev/hda1 + /dev/hdc129.7 GBRAID-1 /dev/md1/dev/hda2 + /dev/hdc2 0.3 GBRAID-1 We use /dev/md0 for the root fs and /dev/md1 for swap. Why? Because it takes about 90 minutes to remirror /dev/md0 and only about 2