[aklug] Re: Need help repairing an Ubuntu raid 5 array

If you have a RAID5 with two bad drives, you have a dead RAID.

If you do go find twin 500G hard drives, you will have to replace them
ONE at a time, and hope that the bad sectors don't ruin your rebuild.

Adam

CLAY SCOTT wrote:
> The boot process drops into a maintenance shell, but I can't fsck the drives. the array consists of sdb1 through sdf1 and fsck at first reported they were busy, then in the maintenance shell said they were available, but saw them as raid drives and complained that it couldn't find e2fsck.mdraid.
>
> now in the livecd the disk monitoring application (which I clearly overlooked installing before) is showing bad sectors on sdc and sde. i'm running tests on them now.
>
> If they can't be repaired I guess I'm looking at having to source some 500GB drives to get the array repaired so I can back it up. Pretty coincidental really considering I was looking to upgrade the array in a few weeks.
>
> I'll let you know how the tests turn out.
>
> ~Clay
>
> ----- Original Message -----
> From: Jim MacDonald <jim@macdonald.org>
> Date: Saturday, December 26, 2009 9:22 pm
> Subject: [aklug] Re: Need help repairing an Ubuntu raid 5 array
> To: CLAY SCOTT <rudeboy@gci.net>
> Cc: aklug@aklug.org
>
>
>> -----BEGIN PGP SIGNED MESSAGE-----
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>> Have you tried booting from a LiveCD to see if you can FSCK /dev/md0?
>>
>>
>> CLAY SCOTT wrote:
>>
>>> My Ubutnu fileserver recently suffered a power failure and I
>>>
>> haven't been able to get the raid5 array working since. I have been
>> meaning to get it on a basic smart UPS that will shut it down
>> during a blackout, but it looks like i dragged my feet too long.
>>
>>> The boot process drops to the maintenance shell when it can't
>>>
>> mount /dev/md0, but i'm not able to reassemble the array, check it,
>> activate it or anything. I'm getting more and more out of practice
>> as my life transitions more toward work and family life.
>>
>>> I normally have hockey on Friday nights, but I was hoping there
>>>
>> was a raid guru out there who could help me get it working again if
>> I were to bring my fileserver down to FNL.
>>
>>> I'm sure it's something stupid and simple I'm overlooking, but
>>>
>> it's driving me nuts. Let me know if anyone is interested in
>> lending a hand.
>>
>>> ~Clay
>>> ---------
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>>>
>>>
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-- 
Adam
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