Re: Grub2 reinstall on raid1 system.
On Sat, 22 Jan 2011 04:54:32 -0500
Tom H <tomh0665@gmail.com> wrote:
> On Fri, Jan 21, 2011 at 8:51 PM, Jack Schneider
> <puck@dp-indexing.com> wrote:
> >
> > I think I found a significant glitch.. I appears that mdadm is
> > confused. I think it happened when I created the /dev/md2 array
> > from the new disks. It looks like the metadata 1.2 vs 0.90 configs
> > is the culprit...
> >
> > Here's the output of:
> >
> > mdadm --detail --scan:
> > ARRAY /dev/md0 metadata=0.90
> > UUID=e45b34d8:50614884:1f1d6a6a:d9c6914c ARRAY /dev/md1
> > metadata=0.90 UUID=c06c0ea6:5780b170:ea2fd86a:09558bd1
> >
> > Here's the output of /etc/mdadm/mdadm.conf:
> >
> > DEVICE partitions
> > CREATE owner=root group=disk mode=0660 auto=yes
> > HOMEHOST <system>
> > MAILADDR root
> > ARRAY /dev/md/0 metadata=1.2
> > UUID=f6de5584:d9dbce39:090f16ff:f795e54c name=hetzner:0
> > ARRAY /dev/md/1 metadata=1.2
> > UUID=0e065fee:15dea43e:f4ed7183:70d519bd name=hetzner:1
> > ARRAY /dev/md/2 metadata=1.2
> > UUID=ce4dd5a8:d8c2fdf4:4612713e:06047473 name=hetzner:2
> >
> > Given that the metadata from 0.90 & 1.2 cannot be on each md0 and
> > md1 at the same time. Although they are on different places on the
> > disks IIRC. Something needs to change... I am thinking of an
> > mdadm.conf edit. But there maybe an alternative tool or
> > approach... ???? This was obtained using my Debian-live amd64
> > rescue disk.
>
> Check your partitions' metadata with "mdadm --examine --scan
> --config=partitions". Those'll be the settings that you'll need in
> mdadm.conf.
>
>
Thanks, Tom
A couple of small ?s. I can get the output of the command on the live
file system and it appears to make sense. I am running on a
debian-live amd64 O/S. The data has 4 arrays and I only have 3, there
are two entries for the "new empty disks" /dev/md/2 and /dev/md127.
They don't appear in /proc/mdstat, so they are not running. Do I need
to "kill them permanently" some how? I need, I think, to get the info
to the mdadm.conf on the "real" /dev/sda1 & /dev/sdc1 partitions. Mount
them on the live system and edit mdadm.conf??? When I reboot, I'll
need the right info... chroot??
TIA Jack
Reply to: