Hi Neil,

I ran mdadm --examine on the devices (as opposed to the partitions)
and was surprised:
Apparently the superblocks are present on some the devices, even if I
remember differently.
I attached the output of mdadm to this mail.

For the sake of clarity, this is how the raid looked like before it
all went wrong:

11 Drives (/dev/sd[abcdefghijk]) alltogether as a RAID 6.
2 of those are spares (/dev/sd[jk]).
1 is either close to failing of has failed (/dev/sdg).

I tried

mdadm --assemble --run /dev/md0 -v /dev/sd[abcdefghi]

which gave me

mdadm: looking for devices for /dev/md0
mdadm: no RAID superblock on /dev/sdg
mdadm: /dev/sdg has no superblock - assembly aborted

So it seems I somehow have to restore the superblocks on drives
/dev/sd[ghijk], or at least on /dev/sd[ghi].
Is this possible? Any help would be greatly appreciated!

Regards,
-P.