On Thu May 02, 2013 at 03:56:54PM +0200, Roberto Nunnari wrote:
> Robin Hill wrote:
> > The safest option would be:
> > - add in the new disks
> > - partition to at least the same size as your existing partitions (they
> > can be larger)
> > - add the new partitions into the arrays (they'll go in as spares)
> > - grow the arrays to 4 members (this avoids any loss of redundancy)
> > - wait for the resync to complete
> > - install grub/lilo/syslinux to the new disks
>
> Ok.. got here.
>
>
> > - fail and remove the old disk partitions from the arrays
>
> Now.. I may need some guidance for the next steps.. please correct me if
> I'm wrong..
>
> to fail the old disk partition from the arrays I should:
> mdadm -f /dev/md0 /dev/sda1
> mdadm -f /dev/md1 /dev/sda2
> mdadm -f /dev/md2 /dev/sda3
> mdadm -f /dev/md0 /dev/sdc1
> mdadm -f /dev/md1 /dev/sdc2
> mdadm -f /dev/md2 /dev/sdc3
>
> and to remove the old disk partition from the arrays I should:
> mdadm -r /dev/md0 /dev/sda1
> mdadm -r /dev/md1 /dev/sda2
> mdadm -r /dev/md2 /dev/sda3
> mdadm -r /dev/md0 /dev/sdc1
> mdadm -r /dev/md1 /dev/sdc2
> mdadm -r /dev/md2 /dev/sdc3
>
> correct?
>
Assuming sda & sdc are your old drives, yes (they were sda & sdb in your
original mail, but possibly they've been reordered if you've rebooted
with the new drives in).
>
> > - shrink the arrays back down to 2 members
>
> to shrink the arrays back down to two members:
> mdadm --grow --raid-devices=2 /dev/md0
> mdadm --grow --raid-devices=2 /dev/md1
> mdadm --grow --raid-devices=2 /dev/md2
>
> correct?
>
Yes, that's all correct.
Cheers,
Robin
--
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( ' } | Robin Hill <robin@xxxxxxxxxxxxxxx> |
/ / ) | Little Jim says .... |
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