[K12OSN] RAID1 failure: need help

[Timothy Legge]

Les Mikesell wrote:
> On Fri, 2005-09-30 at 21:03, Timothy Legge wrote:
> 
> 
>>>Assuming you can shut the machine down, swap in a good drive for
>>>sdb - preferably one with no linux filesystem labels or raid
>>>partitions that might confuse things on the initial boot.
>>
>>When I had this occur, it was a case of a power outage causing the disks 
>>to break the raid set.  I reviewed everything including running the 
>>manufacturers tool to determine whether there was a drive issue.  There 
>>was not, and I have been running with raid for a month or more since I 
>>re added the missing partitions and I have not had any further issue.
> 
> 
> That can happen, but the 'dmesg' log posted showed hardware errors
> reading sectors.  I'd at least want to low-level it before trying
> again and it's pretty likely to be a bad drive.
>  smartctl -a /dev/sdb  might tell you how bad.

I do remember seeing raid1: Disk failure on sdb1, disabling device when 
I had the issue and some other nasty stuff unfortunately, my old logs 
are gone.

I knew my raid was out of sink for a week or more and I did a update of 
grub anyway.  Not a good idea :-(  I had to physically switch the drives 
in order to boot off the "good drive".  That got me worried and I did 
all the tests the hard drive manufactures tool allowed and as I said 
things have been fine.

While I was pretty sure initially I had a bad drive I just could not 
prove it and once the raid set rebuilt itself I was fine.  If Robert is 
lucky he may get similar results.

Tim