[linux-lvm] lvm - problem replacing failed disk
Steven Mosimann
steven.mosimann at uleth.ca
Thu Jun 22 19:12:40 UTC 2006
>On Thu, Jun 15, 2006 at 03:41:20PM -0600, Steven Mosimann wrote:
>> (1) Replaced the failed disk with one of the same size
>> (2) Used pvcreate to make the same physical volumes on the new disk
>> that were present on the failed disk. Example of the actual command I
>> used was:
>> pvcreate --uuid xxxxx /dev/sdb1
>> where xxxxx was the pv uuid from pvdisplay
>
>Missing the --restorefile arg there (for safety - if it was originally
>created by lvm2 with default options it'll make no difference).
>
>Missing a 'vgcfgrestore' step.
>
>> (3) Used vgchange -a y -P to activate the volume group
>
>No need for -P here. That's what you use if you *don't* do steps 1 and 2
>etc.
>
>Alasdair
I checked the commands I issued. I got the pvcreate correct and the
vgcfgrestore is present (though it was out of order with vgchange). Here is
what I have done in detail:
fdisk /dev/sdb
(created three partitions of type LVM that are identical to those on the
failed disk)
mkfs.ext3 /dev/sdb1
mkfs.ext3 /dev/sdb2
mkfs.ext3 /dev/sdb3
(formatted as ext3)
pvcreate --uuid xxxxx --restorefile /etc/lvm/archive/xxxx.ar /dev/sdb1
pvcreate --uuid xxxxx --restorefile /etc/lvm/archive/xxxx.ar /dev/sdb2
pvcreate --uuid xxxxx --restorefile /etc/lvm/archive/xxxx.ar /dev/sdb3
(chose archive file with all PV, LV and VG's from the functioning LVM setup)
vgcfgrestore -f /etc/lvm/backup/VG_data VG_data
(the VG_data matches the functioning LVM setup from above)
vgchange -ay
mount -t ext3 /dev/VG_data/LV_data /data
gives
"error: wrong fs type, bad option, bad superblock on /dev/VG_data/LV_data, or
too many mounted filesystems"
mount /dev/VG_data/LV_data /data
gives
"mount: you must specify filesystem type"
Any suggestions regarding how to proceed.
Steve
(PS. our lab was out of town for a week so I'm only back at it now).
--
Steven Mosimann, PhD
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