Re: best way to try recovering inactive raid6

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2010/12/19 Mikael Abrahamsson <swmike@xxxxxxxxx>:
> On Sun, 19 Dec 2010, Bjørn Eikeland wrote:
>
>> Hope you guys can help me out with some input here!
>
> What mdadm and kernel version are you using?
>
> If you're not using the latest mdadm version (3.1.4 afaik) then try
> --assemble --force with that one first. It does a better job than most of
> the versions that come with most distributions today.
>
> Recreating the array is highly dangerous and it's definitely a last resort.
>
> --
> Mikael Abrahamsson    email: swmike@xxxxxxxxx

$ uname -a
Linux filebear 2.6.32-26-generic #48-Ubuntu SMP Wed Nov 24 09:00:03
UTC 2010 i686 GNU/Linux

$ mdadm -V
mdadm - v3.1.4 - 31st August 2010
$ sudo mdadm --assemble --force /dev/md6
mdadm: /dev/md6 assembled from 2 drives and 2 spares - not enough to
start the array.

$ cat /proc/mdstat
Personalities : [raid6] [raid5] [raid4]
md6 : inactive sdc1[0](S) sdd1[6](S) sdh1[5](S) sda1[3](S)
     3906236416 blocks

unused devices: <none>

mdadm was older, but same behavior with 3.1.14. It was a new ubuntu
install a few days ago so didn't think of updating mdadm, kernel is
fairly recent at least.
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