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Old 03-23-2007, 01:59 PM   #1
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Missing RAID volume(s) after server move/update

Hello All

I'm running RedHat Enterprise Linux 4, Kernel 2.6.9-42.0.10.ELsmp (lspci and DMESG output below). I recently inherited this box and, according to the user, there was a RAID array being mounted as /data2 which is no longer being mounted ever since the move over here. The only things that have changed are

1. We patched the system as soon as it went live on the network (I'm guessing this might have caused the issues)
2. The drives may have (the person who did the move can't say) been put back into the server out of order.

The system is booting fine it's just not finding those volumes anymore. The key error I'm seeing here is

Mar 20 12:23:25 tunl mount: mount: special device LABEL=/data2 does not exist


lspci Output:
DMESG Output:
Old 03-23-2007, 03:20 PM   #2
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The name of the partition implies that it was data. You also say that you inherited it. Does that mean that the data isn't important, but you would just like a working raid array. If so, you could recreate a new array from scratch using the graphical partitioner program.

Otherwise, you will need to find out which program RE uses to control raid arrays. That program or an associated one may have an option to force the drives to be marked good once you get the order correct.

I have SuSE and it uses mdadm, which has an --assume-clean option to mark the raid components as clean. If you can guess the right order, a similar command and option may work. ( I think that Fedora and RH use a different raid program. )

I have assumed that this is using software raid and not hardware raid. You didn't supply enough details on your system for me to know.

SuSE uses mdadm and if I used raid I would read the documentation in /usr/share/doc/packages/mdadm/Software-RAID.HOWTO.html
Look in /usr/share/doc/packages/. There may be similar documentation there for your system.

Last edited by jschiwal; 03-23-2007 at 03:22 PM.
Old 03-26-2007, 11:00 AM   #3
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More Info

Sorry I missed some details, I wrote the first post in haste. Here are more details:

1. The data is VERY important

2. It's unclear is this was a hardware or software RAID. There is no sign of a software RAID every being configured on the box and the BIOS on the RAID controller is password protected, no one knows the password.

3. The RAID controller is a Areca Technology Corporation RAID Controller 1120 PCI-X
Old 03-27-2007, 03:53 PM   #4
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does the raid controller bios show any detected arrays during system boot ?
Old 03-27-2007, 04:05 PM   #5
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You should start by looking carefully through the Areca website. At the very least, I see drivers, firmware and manuals there.

They seem to be geared up to help owners, as well:


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