From mboxrd@z Thu Jan  1 00:00:00 1970
From: piergiorgio.sartor@nexgo.de
Subject: Another RAID-5 problem
Date: Wed, 9 May 2012 11:10:58 +0200 (CEST)
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Hi all,

we're hit by a RAID-5 issue, it seems Ubuntu 12.04 is shipping
some bugged kernel/mdadm combination.

Following the other thread about a similar issue, I understood
it is possible to fix the array without losing data.

Problems are:

1) We do not know the HDD order and it is a 5 disks RAID-5
2) 4 of 5 disks have a data offset of 264 sectors, while the
fourth one, added later, has 1048 sectors.
3) There is a LVM setup on the array, not a plain filesystem.

Any idea on how can we get the array back without losing any
data?

At the moment, it seems quite difficult to provide dump of
"mdadm -E" or similar, since the PC does not boot at all.
In any case, if necessary we could try to take a picture of
the screen and send it here or directly per email, if appropriate.

Thanks a lot in advance,

bye,

-- 

piergiorgio