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Re: [linux-lvm] Remove VOlume group that doesn't exist



Hi Heinz,

PVSCAN reveals:

[root astro melinda]# /sbin/pvscan
 VG data differs between PVs /dev/sdd2 and /dev/sde2
 1 PV(s) found for VG vg01: expected 0
 Out of memory.  Requested 4006555252 bytes.
 Couldn't allocate logical volume maps.
 PV /dev/sdd1    is in exported VG vg02 [9.85 GB / 0    free]
 PV /dev/sde1    is in exported VG vg02 [19.54 GB / 0    free]
 Total: 2 [0   ] / in use: 2 [0   ] / in no VG: 0 [0   ]

/dev/sdd2 and /dev/sde2 have both been reformatted as ext3 fs and their partition type was changed to linux fs using fdisk.

The memory error I haven't seen before (we have 3GB) but I installed a new kernel the other week maybe that is the cause /var/log/messages said:

Sep 8 16:17:15 astro kernel: ide-scsi: hda: unsupported command in request queue (0)
Sep 8 16:17:15 astro kernel: end_request: I/O error, dev 03:1e (hda), sector 0
Sep 8 16:17:15 astro kernel: ide-scsi: hda: unsupported command in request queue (0)
Sep 8 16:17:15 astro kernel: end_request: I/O error, dev 03:1f (hda), sector 0
Sep 8 16:17:16 astro kernel: ide-scsi: hda: unsupported command in request queue (0)
Sep 8 16:17:16 astro kernel: end_request: I/O error, dev 03:20 (hda), sector 0


I don't want to do

dd if=/dev/zero of=/dev/sdd2 bs=512

as /dev/sdd2 now has data on it.

If I look at both drives in fdisk only the parition /dev/sdd1 and /dev/sde1 which make up VG02 are set to "Linux LVM".

Is there someway to rename VG02 as VG01 maybe? I am at a loss.

Many Thanks,

melinda





Heinz J . Mauelshagen wrote:

Melinda,

Does pvscan show /dev/sdd2 as a Physical Volume ?

If so, there's still LVM metadata on /dev/sdd2 in the first sector.
In case the partition is unused (no filesystem etc.), a

dd if=/dev/zero of=/dev/sdd2 bs=512

should remove the PV.

On Wed, Sep 03, 2003 at 09:07:19AM +1000, Melinda Taylor wrote:


Hello,

After my couple of disks died I have been left with one working volume group vg02 and
one non-existant volume group vg01 which I would like to remove.
Since /dev/sdd2 and /dev/sde2 no longer exist I am unable to remove the volume group with the usual method:


/sbin/vgremove vg01
VG data differs between PVs /dev/sdd2 and /dev/sde2
Volume group "vg01" doesn't exist


Actually /dev/sdd2 does still exist as a normal formatted linux partition so I don't want to damage that while trying to remove my volume group.

How do I tell lvm that vg01 no longer exists? It is not in lvmtab so I am unsure where it store this info.


Many Thanks,


melinda



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