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[linux-lvm] lvm - problem replacing failed disk



>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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