I had an unexpected resync at one stage when I changed the system clock.
Mark...
Kirk Patton wrote:
>
> Hello,
>
> We have a linux box running 2.2.12-20 in a raid level 5 configuration.
>
> Today we had problems accessing the server. When I checked, the load
> was up to ~30. A quick check of the /proc/mdstat yielded the
> following
>
> Personalities : [raid5]
> read_ahead 1024 sectors
> md0 : active raid5 sdg1[6] sdf1[5] sde1[4] sdd1[3] sdc1[2] sdb1[1]
> sda1[0] 106653696 blocks level 5, 256k chunk, algorithm 0 [7/7]
> [UUUUUUU] resync=55% finish=72.3min
> unused devices: <none>
>
> All of my nfsd processes are hung waing to get at the disk. I am not
> sure what started this.
>
> I was wondering if anyone could shed some light on a couple questions
> for me.
>
> What causes the following message;
> Jun 15 03:09:48 cmdfs2 kernel: md: md0: raid array is not clean --
> starting background reconstruction
>
> The raid howto said something about a ungracefull shutdown causing
> this. Can anything else cause it?
>
> How can I tell if a disk in a raid 5 config has gone bad? I want to
> set up a system monitor to page me in just such an event.
>
> I plan on upgrading the kernal on this machine as well as a few
> others. Are there any significant problems with the the raid as
> shippen with Redhat 6.1?
>
> Any help is appreciated.
>
> Thanks,
> Kirk
>
> --
> Kirk Patton
> System Administrator
> CA Microprocessor Division
> Advanced Micro Devices
> Phone (408) 774-7883
> Pgr. (408) 870-5461
> Fax (408)774-7606
