[SATLUG] 1st Q? - RAID5 quit working - Attempting recovery #2

Herb Cee hc at lookcee.com
Fri Aug 21 14:37:17 CDT 2009


Samuel Leon wrote:
> David Labens wrote:
>> Sam,
>>
>> Thank you.  I found this tutorial:
>> http://www.debianadmin.com/recover-data-from-a-dead-hard-drive-using-ddrescue.html 
>>
>>
>> and have done apt-get install ddrescue
>>
>> I'll read more on it this evening, before I try to make it work.
>>
>> Thanks,
>> David Labens
>
>
> I found this: http://www.forensicswiki.org/wiki/Ddrescue
>
> So:
>
> First you copy as much data as possible, without retrying or splitting 
> sectors:
>
>     ddrescue --no-split /dev/sdc /dev/newdrive logfile
>
> Now let it retry previous errors 3 times, using uncached reads:
>
>     ddrescue --direct --max-retries=3 /dev/sdc /dev/newdrive logfile
>
>
> If that fails you can try again but retrimmed, so it tries to reread 
> full sectors:
>
>     ddrescue --direct --retrim --max-retries=3 /dev/sdc /dev/newdrive 
> logfile
>
> I don't know what gets written to logfile or where it gets written at 
> (perhaps /root/logfile?) But if it is not too big please let us see it :)
>
> Also you might try putting the bad harddrive in different positions 
> (ie, upside down, sideways) to see if that helps with getting the data 
> off of it.
>
> Sam
Sam would freezing the drive maybe help since many have had success with 
that trick. I dunno, never had to use it
herb


More information about the SATLUG mailing list