Re: Recovery of failed RAID 6 and LVM

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On 9/28/11 1:13 AM, NeilBrown wrote:
On Tue, 27 Sep 2011 21:12:58 +0200 "Marcin M. Jessa"<lists@xxxxxxxxx>  wrote:

On 9/26/11 11:31 AM, NeilBrown wrote:
On Mon, 26 Sep 2011 11:05:38 +0200 "Marcin M. Jessa"<lists@xxxxxxxxx>   wrote:

On 9/26/11 12:18 AM, NeilBrown wrote:

Do you remember what filesystem you had on 'storage'?  Was it ext3 or ext4 or
xfs or something else?

You're giving me some hope here and then silence :)
Why did you ask about the file system? Should I run fsck on the LV ?




You already did run fsck on the LV.  It basically said that it didn't
recognise the filesystem at all.
I asked in case maybe it was XFS in which case a different tool would be
required.

Looks like I didn't remember correctly. I ran testdisk and it reported
the file system to be XFS. What would you suggest now Neil?



Presumably
    xfs_check /dev/fridge/storage

and then maybe
    xfs_repair /dev/fridge/storage

but I have no experience with XFS - I'm just reading man pages.


That didn't work so I decided to give photorec a spin and so far it could find and recover lots of files [1]. Why the heck is photorec able to do so but the normal file system fixing tools are just useless?


[1]:
Disk /dev/dm-0 - 5368 GB / 5000 GiB (RO)
Partition Start End Size in sectors
No partition 0 10485759999 10485760000 [Whole disk]


Pass 2 - Reading sector 1506591634/10485760000, 843 files found
Elapsed time 10h16m59s - Estimated time for achievement 61h17m10
txt: 445 recovered
exe: 198 recovered
mpg: 62 recovered
swf: 33 recovered
tx?: 33 recovered
gif: 25 recovered
gpg: 19 recovered
bmp: 5 recovered
gz: 4 recovered
riff: 4 recovered
others: 15 recovered



--

Marcin M. Jessa
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