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Old 05-11-2007, 10:03 AM   #1
jim.thornton
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Registered: May 2007
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Noob to Linux - Need help setting up RAID 1 with SUSE 10.2


I recently purchased a Dell PowerEdge 840 server. The hardware is as follows:

Xeon 3060 2.6 Ghz (Dual Core) - 1066 Ghz FSB - 4MB Cache
4GB DDR2 - 533 Mhz (4x1GB)
SAS5iR Controller - Supports RAID 2-4 drives - PCI Express
Hot Swap Chassis
2x500GB SATA II HDD at 7200 RPM (Seagate)
BCOM TOE - not enabled (I have no clue what this is)
Single onboard Network adaptor - not TOE

Initially when I went to install the system, I discovered that the default setup was using a RAID0 (I think), that is to say that it looked like there was one hdd that was 1 TB instead of 2x500GB hdd's.

I figured out that I had to go into the CTRL+C setup screen and further discovered how to setup the RAID1 - So I thought.

I proceeded to install SUSE 10.2 and everything seemed to work great. However, to test the RAID1 after the install I took out the top hdd and rebooted. It booted fine into the OS.

I then took out the bottom drive and re-inserted the top drive and it crashed on bootup giving some kind of error message.

I then switched that drive that was in the bottom slot and put it in the top slot (and I kept the other drive out) and I got the same error message.

I then switched that drive back to the bottom and reinserted the top drive again. And voila! it worked great!

I've been reading today and people are saying something about coping the /boot to the second drive. However, I know nothing about linux (yet) and I'm lost.

Can anyone tell me why I'm getting these errors? It is hardware RAID so I thought it would've worked easier than this.
 
Old 05-12-2007, 09:30 PM   #2
rtspitz
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Registered: Jan 2005
Location: germany
Distribution: suse, opensuse, debian, others for testing
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so it's hardware raid. good.

I think what happened is this:

when you pulled the 1st disk and rebooted, the array was marked as degraded, the system still worked after reboot.
then you pulled the 2nd disk and reinserted the disk you pulled the 1st time WITHOUT REBUILDING (syncing) the disks in the array. the controller needs to make sure the data on the 2 disks is identical, and as it cannot know what's happened to the pulled/faulty disk a rebuild is necessary.

you should be able to pull 1 disk at a time, reinsert it, let the controller do a rebuild, and then pull the other one.
changing disk order may be causing errors.

the part with copying the /boot folder is irrelevant, as it's a hardware raid.

Last edited by rtspitz; 05-12-2007 at 09:33 PM.
 
Old 05-13-2007, 12:33 AM   #3
jim.thornton
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Registered: May 2007
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I think the problem is that i didn't syncronize it in the first place. I assumed that when I went into the config utility and created the raid, and then after I installed the OS that it would automatically mirror it.

Right now, I went into the config utility and selected to syncronize it. As I type this message it is 17% synced. Do I have to wait in the utility for this to get to 100% or is it something that will continue after a reboot while it is in the OS??
 
  


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