Borked MD RAID...

[Lonni J Friedman]

Are you sure that you don't have a spare designated somewhere?

On Tue, Dec 2, 2008 at 2:32 PM, Eitan Tsur <eitan.tsur at gmail.com> wrote:
> Ok, so here's what /proc/mdstat says after a clean reboot:
>
> Personalities : [raid6] [raid5] [raid4]
> md0 : active raid5 sdb1[0] sdc1[1]
>       1465143808 blocks level 5, 256k chunk, algorithm 2 [3/2] [UU_]
>
> md_d0 : inactive sdd[2](S)
>       732574464 blocks
>
> unused devices: <none>
>
> I basically have to do:
>
>>mdadm --stop /dev/md_d0
>>mdadm --add /dev/md0 /dev/sdd1
>>cat /proc/mdstat
> Personalities : [raid6] [raid5] [raid4]
> md0 : active raid5 sdd1[3] sdb1[0] sdc1[1]
>       1465143808 blocks level 5, 256k chunk, algorithm 2 [3/2] [UU_]
>       [>....................]  recovery =  0.4% (3269252/732571904)
> finish=153.7min speed=79057K/sec
>
> unused devices: <none>
>
> Furthermore, the first time I saw this, it was /dev/sdb that had dropped.
> Yesterday it was /dev/sdc.  Today it's /dev/sdd.  That's what throws me off
> about this whole thing.
>
> Regards,
> -Eitan-
>
> On Sun, Nov 30, 2008 at 2:41 PM, Lonni J Friedman <netllama at gmail.com>
> wrote:
>>
>> On Sun, Nov 30, 2008 at 2:38 PM, Eitan Tsur <eitan.tsur at gmail.com> wrote:
>> > I just recently installed a 3-disk RAID5 array in a server of mine,
>> > running
>> > FC9. Upon reboot, one of the drives drops out, and is allocated as a
>> > spare.
>> > I suspect there is some sort of issue where DBUS re-arranges the
>> > drive-to-device maps between boots, but I am not sure... Just kind of
>> > annoying to have to stop and re-add a drive every boot, and wait the
>> > couple
>> > hours for the array to rebuild the 3rd disk. Any thoughts? Anyone else
>> > encountered such an issue before? What should I be looking for? I'm new
>> > to
>> > the world of RAID, so any information you can give may be helpful.
>>
>> What's in /etc/mdadm.conf, /proc/mdstat and dmesg when this fails ?
>>



-- 
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L. Friedman                                    netllama at gmail.com
LlamaLand                       https://netllama.linux-sxs.org