Re: Problem with filesystem on RAID5 array (fsck -b?)

On Tue, Jun 27, 2006 at 02:54:23PM +0200, Morten A. Middelthon wrote:
On Tue, Jun 27, 2006 at 02:49:37PM +0200, Morten A. Middelthon wrote:
Hi list,

I'm running FreeBSD 6.1-RELEASE-p2 on a Dell PowerEdge 1850 with an attached
Dell PowerVault 220S disk cabinet. The cabinet has two RAID5 arrays each with
6 x 300GB SCSI disks. The RAID controller is a Dell PERC4/DC using the amr
driver. Two days ago a disk failed in one of the arrays. Rebuilding the array
after replacing the broken disk did not work as it should, so after discussing
our options with Dell support they recommended I should delete the array on
the controller BIOS, then create a new identical array without initializing
it. According to their theory the data should be intact. Unfortunately, that
doesn't seem to be the case. When FreeBSD boots I get an "UNEXPECTED
INCONSISTENCY" error message when the filesystem is mounted, and then I have
to run fsck manually. When running fsck I get this message:
<snip>

I just noticed another thing. The two arrays should be identical in size,
although they are not:

amr0: delete logical drives supported by controller
amrd0: <LSILogic MegaRAID logical drive> on amr0
amrd0: 1430505MB (2929674240 sectors) RAID 5 (optimal)
amrd1: <LSILogic MegaRAID logical drive> on amr0
amrd1: 1430400MB (2929459200 sectors) RAID 5 (optimal)
amr1: delete logical drives supported by controller

Is it perhaps possible to change the partition info to match the old
functioning array?

Here is the dmesg output before I re-created the array:

amr0: delete logical drives supported by controller
amrd0: <LSILogic MegaRAID logical drive> on amr0
amrd0: 1430505MB (2929674240 sectors) RAID 5 (optimal)
amrd1: <LSILogic MegaRAID logical drive> on amr0
amrd1: 1430505MB (2929674240 sectors) RAID 5 (degraded)
amr1: delete logical drives supported by controller

as you can see, the volumes are identical

--
Morten A. Middelthon

Elveys burroo muney frum a pesseemist;
he-a duesn't ixpect tu be-a peeed beck.
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