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Re: Borked MD RAID...



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 gmail com> wrote:
On Sun, Nov 30, 2008 at 2:38 PM, Eitan Tsur <eitan tsur 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 ?


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

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