[CentOS] Drive Failing

[John Summerfield]

John R Pierce wrote:
> Mike Kercher wrote:
> 
>> I got an email from smartd yesterday with the following error:
>>
>> SMART Health Status: SERVO IMPENDING FAILURE SEEK ERROR RATE TOO HIGH
>> [asc=5d,ascq=43]
>>
>> I understand this means the drive is probably going to fail.  This
>> device is /dev/sda and is part of /dev/mapper/VolGroup00-LogVol00
>>
>> Is it possible to replace the single failing drive and if so, what would
>> be the steps so that data isn't lost.
>>   
> 
> 
> http://tldp.org/HOWTO/LVM-HOWTO/removeadisk.html
> 
> /dev/sda, is that your boot device?   that will greatly complicate 
> things...  and, your swap is probably not under LVM, /boot certainly 
> isn't so there's moer on that drive than just part of VolGroup00
> 
> I think I'd opt for plan B...  install an identical new drive on another 
> SCSI unit, boot a standalone live CD, and DD image the whole raw 
> physical drive /dev/sda, then swap this new drive to SCSI unit 0 and 
> remove the failed one.


I discovered recently that getting exactly the same size (I am using 
ATA) can be difficult, and two drives "the same size" can differ by a 
few sectors.

I'm sure bigger is okay, smaller is not (but you might be able to fiddle 
with /boot and/or dispense with the swap partition. I prefer swap files 
anyway))




-- 

Cheers
John

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