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Re: [linux-lvm] vgremove fails to remove empty VG (v2.02.98)

On 01/24/2013 09:09 AM, Joschi Brauchle wrote:
Thanks for the detailed instructions, here are (some of) the missing
gaps :-)

I get the following error with lvm2.02.98:
#/sbin/vgdisplay --units k -v 'system'

--- Volume group ---
VG Name system
System ID
Format lvm2
Metadata Areas 1
Metadata Sequence No 13
VG Access read/write
VG Status resizable
Cur LV 0
Open LV 0
Max PV 0
Cur PV 1
Act PV 1
VG Size 104669184.00 KiB
PE Size 4096.00 KiB
Total PE 25554
Alloc PE / Size 0 / 0 KiB
Free PE / Size 25554 / 104669184.00 KiB
VG UUID Qs0uaZ-L88n-tC7T-fZQj-sgJY-2yRX-Dlt2Cr

--- Physical volumes ---
PV Name /dev/sda3
PV UUID wzGjXi-F2lT-d2d4-l5a6-EmfM-W838-YxaFIh
PV Status allocatable
Total PE / Free PE 25554 / 25554

VG system is empty, but still:
# /sbin/vgremove 'system'
failes with status code 5, which means 'can't remove volume group
containing logical volumes' (from man page).

0. Which distro?
openSUSE 12.3 Beta 1 - Problem happens during installation, where an
existing VGroup shall be removed.

1. lvmdump -ma
attached (hope that's ok)

2. vgremove -vvvv &> vgremove-dirty.out

3. ps aux | grep lvmetad
Not running, no processes found. Skipping the remaining steps...

3.1 if so, the issue is likely to go away after restarting it. If you
`gcore` or `kill -SEGV` it to get a core dump it may help us.
3.2 do another lvmdump here, to get "updated" data after lvmdump restart
3.3 retry 'vgremove -vvvv &> vgremove-reloaded.out'
4. pastebin the vgremove-dirty.out and we will be able to tell more then.

Any chance the FS containing /etc/lvm is mounted read-only?

If so it may fail. There is a bug as no error is reported in that situation. See backup section of lvm.conf - set backup and archive to point to a writable FS.

If not, could you send a tarball with /etc/lvm: `tar czf lvmdump-etc /etc/lvm/`

Joining us on IRC: #lvm @ freenode guarantees faster answers.

-- Marian

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read the LVM HOW-TO at http://tldp.org/HOWTO/LVM-HOWTO/

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