Re: raid5 reshape is stuck

[NeilBrown <neilb@suse.de>]

[-- Attachment #1: Type: text/plain, Size: 3958 bytes --]

On Wed, 27 May 2015 08:04:24 -0400 (EDT) Xiao Ni <xni@redhat.com> wrote:

> 
> 
> ----- Original Message -----
> > From: "NeilBrown" <neilb@suse.de>
> > To: "Xiao Ni" <xni@redhat.com>
> > Cc: linux-raid@vger.kernel.org
> > Sent: Wednesday, May 27, 2015 7:34:49 PM
> > Subject: Re: raid5 reshape is stuck
> > 
> > On Wed, 27 May 2015 07:28:04 -0400 (EDT) Xiao Ni <xni@redhat.com> wrote:
> > 
> > 
> > > [root@intel-waimeabay-hedt-01 mdadm]# cat
> > > /usr/lib/systemd/system/mdadm-grow-continue\@.service
> > > #  This file is part of mdadm.
> > > #
> > > #  mdadm is free software; you can redistribute it and/or modify it
> > > #  under the terms of the GNU General Public License as published by
> > > #  the Free Software Foundation; either version 2 of the License, or
> > > #  (at your option) any later version.
> > > 
> > > [Unit]
> > > Description=Manage MD Reshape on /dev/%I
> > > DefaultDependencies=no
> > > 
> > > [Service]
> > > ExecStart=/usr/sbin/mdadm --grow --continue /dev/%I
> > > --backup-file=/root/tmp0
> > 
> > Please remove the ---backup-file=/root/tmp0 for further testing.  The patch I
> > provided should make that unnecessary.
> > 
> > > StandardInput=null
> > > StandardOutput=null
> > > StandardError=null
> > 
> > Could you try removing these - that might allow error messages to appear.
> > I wonder why I included them - they shouldn't be needed.
> > 
> > Thanks,
> > NeilBrown
> > 
> > 
> 
> [root@intel-waimeabay-hedt-01 mdadm]# mdadm -CR /dev/md0 -l5 -n4 /dev/loop[0-3] --assume-clean
> mdadm: /dev/loop0 appears to be part of a raid array:
>        level=raid5 devices=5 ctime=Wed May 27 02:45:08 2015
> mdadm: /dev/loop1 appears to be part of a raid array:
>        level=raid5 devices=5 ctime=Wed May 27 02:45:08 2015
> mdadm: /dev/loop2 appears to be part of a raid array:
>        level=raid5 devices=5 ctime=Wed May 27 02:45:08 2015
> mdadm: /dev/loop3 appears to be part of a raid array:
>        level=raid5 devices=5 ctime=Wed May 27 02:45:08 2015
> mdadm: Defaulting to version 1.2 metadata
> mdadm: array /dev/md0 started.
> [root@intel-waimeabay-hedt-01 mdadm]# mdadm /dev/md0 -a /dev/loop4 
> mdadm: added /dev/loop4
> [root@intel-waimeabay-hedt-01 mdadm]# mdadm --grow /dev/md0 --raid-devices=5
> mdadm: Need to backup 6144K of critical section..
> [root@intel-waimeabay-hedt-01 mdadm]# cat /proc/mdstat 
> Personalities : [raid6] [raid5] [raid4] 
> md0 : active raid5 loop4[4] loop3[3] loop2[2] loop1[1] loop0[0]
>       1532928 blocks super 1.2 level 5, 512k chunk, algorithm 2 [5/5] [UUUUU]
>       [>....................]  reshape =  0.0% (0/510976) finish=532.2min speed=0K/sec
>       
> unused devices: <none>
> [root@intel-waimeabay-hedt-01 mdadm]# cat /usr/lib/systemd/system/mdadm-grow-continue\@.service 
> #  This file is part of mdadm.
> #
> #  mdadm is free software; you can redistribute it and/or modify it
> #  under the terms of the GNU General Public License as published by
> #  the Free Software Foundation; either version 2 of the License, or
> #  (at your option) any later version.
> 
> [Unit]
> Description=Manage MD Reshape on /dev/%I
> DefaultDependencies=no
> 
> [Service]
> ExecStart=/usr/sbin/mdadm --grow --continue /dev/%I 
> #StandardInput=null
> #StandardOutput=null
> #StandardError=null
> KillMode=none
> 
> 
> The problem still exist. And there are messages in /var/log/messages
> 
> May 27 08:03:29 intel-waimeabay-hedt-01 systemd: mdadm-grow-continue@md0.service: main process exited, code=exited, status=1/FAILURE
> May 27 08:03:29 intel-waimeabay-hedt-01 systemd: Unit mdadm-grow-continue@md0.service entered failed state.
> 

Does
  systemctl status -l mdadm-grow-continue@md0.service

report anything different.  That was the result I expected from removing the
Standard*=null lines.

I assume the new mdadm is installed in /usr/sbin/mdadm.

Thanks,
NeilBrown

[-- Attachment #2: OpenPGP digital signature --]
[-- Type: application/pgp-signature, Size: 811 bytes --]