Robin Hill wrote:
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).
yes.. they've been reordered.
Any checks I should run here, or can I relay on error messages
evenctually printed on screen when the commands are run?
Thanks.
Robi
- 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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