Re: Raid 5 to raid 6 reshape failure after reboot

[Guy Martin <gmsoft@tuxicoman.be>]

Hi Neil,

Here is the output I've got :

bleh mdadm # ./mdadm --assemble /dev/md0 /dev/sd[bdef]1 --backup-file
backup  -v mdadm: looking for devices for /dev/md0
mdadm: /dev/sdb1 is identified as a member of /dev/md0, slot 0.
mdadm: /dev/sdd1 is identified as a member of /dev/md0, slot 1.
mdadm: /dev/sde1 is identified as a member of /dev/md0, slot 3.
mdadm: /dev/sdf1 is identified as a member of /dev/md0, slot 2.
mdadm:/dev/md0 has an active reshape - checking if critical section
needs to be restored mdadm: too-old timestamp on backup-metadata on
backup mdadm: Failed to find backup of critical section
mdadm: Failed to restore critical section for reshape, sorry.

The backup file is of course the one I've been using for the grow
command.

The values I've got :
 - info->array.utime : 1256026602
 - bsb.mtime : 1256020033

My timezone is Europe/Brussels if that matters.

Removing this check makes the reshape continue and the array start
correctly.

Let me know if you want me to do some more tests.

HTH,
  Guy


On Tue, 20 Oct 2009 16:54:43 +1100
"NeilBrown" <neilb@suse.de> wrote:

> I tried to reproduce this and failed - it works perfectly for me.
> 
> I have added some more tracing messages to --assemble which are
> enabled by --verbose.
> Could you please pull the latest devel-3.1 branch from my git tree and
> try the same assemble command but with --verbose at the end and
> report the result.
> 
> Thanks.
> NeilBrown
>