Topic: RAID Query

[vickviking]

Can someone explain this: -

Personalities : [raid1]
read_ahead 1024 sectors
md2 : active raid1 hdc3[1]                   264960 blocks       [2/1] [_U]
md1 : active raid1 hda2[0] hdc2[1]       116848704 blocks  [2/2] [UU]
md0 : active raid1 hda1[0] hdc1[1]       104320 blocks       [2/2] [UU

========
I have just carried out a fresh install of 6.0.1 (was 5.6)

Does this output indicate a problem with the software RAID?

md2 does not seem to have any partner?

Confused
Phil

[vickviking]

Ok, so a bit more digging around and I can see that: -

The first Hard Disk has a problem as highlighted by the fact that hda3 partition is missing for md2.  hda being the first hard disk on primary IDE controller and hdc being the first hard disk on the secondary IDE controller.

md2 : active raid1 hdc3[1] 264960 blocks [2/1] [_U]

So I guess I need to: -

1) Shutdown the server
2) Replace hda (first hard disk on primary IDE controller)
3) Boot off hdc (first hard disk on the secondary IDE controller) if BIOS allows
4) Recreate partions on hda using fdisk
5) Rebuild mirror

It would be great if someone could confirm the above.

Many thanks
phil

[rick1908]

I am not a real expert, but I have had some experience with failing raid drives in linux (specifiacly SME).

I have the exact same setup and every so often (a couple of times a year), I lose one of the partitions on a drive. I knew it couldn't have been the drives failing cuase it happened too often.

Then I found this link: http://forums.contribs.org/index.php?topic=25747.msg104375#msg104375

My failures always happen on the md1 device not the md2. I would still give this a try first before ripping out the drive and replacing.

Hope this helps. Good luck.

-Rick Evans
Ft. lauderdale, FL