(unknown),

(unknown),

[Jack Etherington]

Hello,
I am not sure whether troubleshooting messages are allowed on the mdadm
mailing list (or it is for development and bugs only) so please point me in
the right direction if this is not the right place.

Before posting here I have tried using the following resources for
information:
>Google
>Distribution IRC channel (Ubuntu)
>Linuxquestions.org

My knowledge of Linux is beginner/moderate.

My setup is:
9x1tb Hard Drives (2xhitachi and 7x Samsung HD103UJ)
Supermicro AOC-SAT2-MV8 8 Port SATA Card
1xMotherboard SATA port
Single RAID5 array created with mdadm, printout of /proc/mdstat:

root@server3:~# cat /proc/mdstat
Personalities : [linear] [multipath] [raid0] [raid1] [raid6] [raid5] [raid4]
[raid10]
md0 : active raid5 sdj1[7] sdc1[0] sda1[8] sdg1[6] sdi1[9](F) sdd1[4]
sde1[3] sdh1[2] sdf1[10](F)
      7814079488 blocks level 5, 64k chunk, algorithm 2 [9/7] [U_UUU_UUU]


A printout of /var/messages is available here: http://pastebin.com/m6499846
as not to make this post any longer...
(The array has been down for about a month now. It is my home storage
server, non-critical, but I do not have a backup)

Also a printout of ‘mdadm --detail /dev/md0’ is available here:
http://pastebin.com/f44b6e069

I have used ‘mdadm -v -A -f /dev/md0’ to get the array online again, and can
read data (intact without errors) from the array, but it soon becomes
degraded again.

Any help on where to start would be greatly appreciated :)

Jack


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Re: md raid5 keeps going degraded.

[Neil Brown]

On Friday June 5, jack@the-etheringtons.co.uk wrote:
> Hello,
> I am not sure whether troubleshooting messages are allowed on the mdadm
> mailing list (or it is for development and bugs only) so please point me in
> the right direction if this is not the right place.

Anything about raid and linux is welcome here.

> 
> Before posting here I have tried using the following resources for
> information:
> >Google
> >Distribution IRC channel (Ubuntu)
> >Linuxquestions.org
> 
> My knowledge of Linux is beginner/moderate.
> 
> My setup is:
> 9x1tb Hard Drives (2xhitachi and 7x Samsung HD103UJ)
> Supermicro AOC-SAT2-MV8 8 Port SATA Card
> 1xMotherboard SATA port
> Single RAID5 array created with mdadm, printout of /proc/mdstat:
> 
> root@server3:~# cat /proc/mdstat
> Personalities : [linear] [multipath] [raid0] [raid1] [raid6] [raid5] [raid4]
> [raid10]
> md0 : active raid5 sdj1[7] sdc1[0] sda1[8] sdg1[6] sdi1[9](F) sdd1[4]
> sde1[3] sdh1[2] sdf1[10](F)
> 

Re:

[Roger Heflin]

Jack Etherington wrote:
> Hello,
> I am not sure whether troubleshooting messages are allowed on the mdadm
> mailing list (or it is for development and bugs only) so please point me in
> the right direction if this is not the right place.
> 
> Before posting here I have tried using the following resources for
> information:
>> Google
>> Distribution IRC channel (Ubuntu)
>> Linuxquestions.org
> 
> My knowledge of Linux is beginner/moderate.
> 
> My setup is:
> 9x1tb Hard Drives (2xhitachi and 7x Samsung HD103UJ)
> Supermicro AOC-SAT2-MV8 8 Port SATA Card
> 1xMotherboard SATA port
> Single RAID5 array created with mdadm, printout of /proc/mdstat:
> 
> root@server3:~# cat /proc/mdstat
> Personalities : [linear] [multipath] [raid0] [raid1] [raid6] [raid5] [raid4]
> [raid10]
> md0 : active raid5 sdj1[7] sdc1[0] sda1[8] sdg1[6] sdi1[9](F) sdd1[4]
> sde1[3] sdh1[2] sdf1[10](F)
>       7814079488 blocks level 5, 64k chunk, algorithm 2 [9/7] [U_UUU_UUU]
> 
> 
> A printout of /var/messages is available here: http://pastebin.com/m6499846
> as not to make this post any longer...
> (The array has been down for about a month now. It is my home storage
> server, non-critical, but I do not have a backup)
> 
> Also a printout of ‘mdadm --detail /dev/md0’ is available here:
> http://pastebin.com/f44b6e069
> 
> I have used ‘mdadm -v -A -f /dev/md0’ to get the array online again, and can
> read data (intact without errors) from the array, but it soon becomes
> degraded again.
> 
> Any help on where to start would be greatly appreciated :)
> 
> Jack


What kind of MB do you have on this setup?

And that card is in a PCI-X slot isn't it?

And how big of power supply do you have?   What is the rating of the 
Amps on the +12V line?

And is it always the same disks or disks that fault, or is any disk 
just as likely to have issues?
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