[NBLUG/talk] I feel dirty and degraded.... Software Raid Recovery

[Mark Street]

Hi,

I have a Fedora Core 4 box with 4 SCSI disks on an LSI controller running 
Software RAID 5.

The machine lost drive 2 and I was not able to login to shut it down properly.

I removed the failed drive and tried to boot the machine on the 3 remaining 
drives...  grub came up and the machine would start to boot but it would get 
to the point of mounting the array and would complain about the array being 
dirty and degraded and fail to mount ext3 partitions... instant kernel panic.

I aquired my new drive and booted the machine with Knoppix 5.  I can see all 
of my drives and their partitions (3) each for the existing drives in the 
array, the new drive has no partitions.  Does anyone have sage advice on 
re-assembling this dirty and degraded array?  I have the mdadm command on 
Knoppix.

mdadm --assemble /dev/md0 --level=5 --raid-devices=3 missing /dev/sdb

??  Then add the new drive once I can clean up the original existing drives 
with an mdadm /dev/md0 -a /dev/sda2?

TIA
-- 
Mark Street, D.C., RHCE
CTO Alliance Medical Center
http://www.oswizards.com
http://www.alliancemed.org
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