Assistance needed with a failed RAID-5 array

Assistance needed with a failed RAID-5 array

[Alan Worstell]

Hello,
This morning I discovered that a raid-5 array I had created last week is
listing all 3 drives in a failed state:

md1 : active raid5 sdm1[4](F) sdp1[3](F) sdl1[1](F) sdo1[0](F)
        3726024192 blocks super 1.2 level 5, 64k chunk, algorithm 2 [3/0]
[___]

This array has some pretty critical stuff on it I would like to get
back. Here is a link with /var/log/messages, dmesg, and the output
of|mdadm --examine on all of the members: |||
http://filebin.net/ryi7vq7reg
Any assistance would be greatly appreciated.

Thanks,

-- 
Alan Worstell
A1 Networks - Systems Administrator
VTSP, VCA-DCV, dCAA, LPIC-1, Linux+, CLA, DCTS
(707)570-2021 x204
For support issues please email support@a-1networks.com or call 707-703-1050

Re: Assistance needed with a failed RAID-5 array

[Mikael Abrahamsson]

On Mon, 7 Apr 2014, Alan Worstell wrote:

> Hello,
> This morning I discovered that a raid-5 array I had created last week is
> listing all 3 drives in a failed state:
>
> md1 : active raid5 sdm1[4](F) sdp1[3](F) sdl1[1](F) sdo1[0](F)
>       3726024192 blocks super 1.2 level 5, 64k chunk, algorithm 2 [3/0]
> [___]
>
> This array has some pretty critical stuff on it I would like to get
> back. Here is a link with /var/log/messages, dmesg, and the output
> of|mdadm --examine on all of the members: |||
> http://filebin.net/ryi7vq7reg
> Any assistance would be greatly appreciated.

There are a lot of problems related to sdd, but that doesn't seem to be 
part of the above array.

I would advice you to try to use --assemble --force on the above md1, 
however the event count on all the component drives are quite diverse (52, 
81, 41 and 29). If this device contains important data, how can the event 
count be so low? You seem to have created it 4-5 days ago?

-- 
Mikael Abrahamsson    email: swmike@swm.pp.se