Re: [linux-lvm] Cannot delete lv

["Bryn M. Reeves" <bmr@redhat.com>]

-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1

On 01/30/2012 04:50 PM, James B. Byrne wrote:
> [root@vhost01 ~]# lsblk NAME
> MAJ:MIN RM   SIZE RO TYPE MOUNTPOINT .  .  . 
> ├─vg_vhost01-lv_vm_base (dm-5) 253:5    0   7.8G  0
> lvm │ ├─vg_vhost01-lv_vm_basep1 (dm-17) 253:17
> 0   500M  0 dm │ └─vg_vhost01-lv_vm_basep2
> (dm-18) 253:18   0   7.3G  0 dm
> 
> .  .  .
> 
> Am I misunderstanding your instructions?

The partition maps were apparently created with kpartx's "-p p" option
to force a partition separator of 'p' (the default is to use a 'p' if
the device name ends with a numeral but no separator otherwise).

If the maps were created with -pp kpartx will refuse to remove them if
the option is not given (but helpfully doesn't report any error.. :-/):

# ls /dev/mapper/vg_mother-lv_base*
/dev/mapper/vg_mother-lv_base  /dev/mapper/vg_mother-lv_basep1
# kpartx -d /dev/mapper/vg_mother-lv_base
# ls /dev/mapper/vg_mother-lv_base*
/dev/mapper/vg_mother-lv_base  /dev/mapper/vg_mother-lv_basep1
# kpartx -d -pp /dev/mapper/vg_mother-lv_base
# ls /dev/mapper/vg_mother-lv_base*
/dev/mapper/vg_mother-lv_base

Just add the -pp to your kpartx command lines and it should remove the
devices.

Regards,
Bryn.
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.4.11 (GNU/Linux)
Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org/

iEYEARECAAYFAk8mzX0ACgkQ6YSQoMYUY96ySwCZATKsF6+UiQ1FKtwQK/4XX2uP
G20AniKYezGGkZreHCvp0onymhIpXp8M
=tTC2
-----END PGP SIGNATURE-----