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

Jeremy Mann jeremymann at gmail.com
Fri Aug 21 09:05:08 CDT 2009

On Fri, Aug 21, 2009 at 7:05 AM, David Labens<adlabens at swbell.net> 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

David, it almost seems to me that the kernel didn't load the RAID
modules (assuming you have them as modules and not builtin).

Can you grep dmesg to see if it indeed load them? You'll see something
like this:

md: raid0 personality registered for level 0
md: raid1 personality registered for level 1
md: raid10 personality registered for level 10
raid6: int64x1   2039 MB/s
raid6: int64x2   2828 MB/s
raid6: int64x4   2164 MB/s
raid6: int64x8   2085 MB/s
raid6: sse2x1    1804 MB/s
raid6: sse2x2    3617 MB/s
raid6: sse2x4    4316 MB/s
raid6: using algorithm sse2x4 (4316 MB/s)
md: raid6 personality registered for level 6
md: raid5 personality registered for level 5
md: raid4 personality registered for level 4
raid5: automatically using best checksumming function: generic_sse
raid5: using function: generic_sse (7732.000 MB/sec)

Jeremy Mann
jeremy at biochem.uthscsa.edu

University of Texas Health Science Center
Bioinformatics Core Facility
Phone: (210) 567-2672

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