[linux-lvm] lvcreate --thin gives "unknown segment type" error

Kumar amit mehta gmate.amit at gmail.com
Mon Jul 22 05:15:02 UTC 2013


While trying to create thin provisioned volume, I'm getting "unknown 
segment type" error. Please see the logs below:

# cat /etc/redhat-release 
Red Hat Enterprise Linux Server release 6.4 (Santiago)

# uname -r

# dmsetup targets
thin-pool        v1.5.1
thin             v1.5.1
multipath        v1.5.0
mirror           v1.12.0
striped          v1.5.6
linear           v1.1.0
error            v1.0.1

# lvm version
  LVM version:     2.02.99(2)-git (2012-10-22)
  Library version: 1.02.78-git (2012-10-22)
  Driver version:  4.23.6

# vgs|grep -i testvg
  testvg          2   0   0 wz--n- 3.99g    3.99g

# pvs -o +devices|grep -i testvg
  /dev/vdc   testvg        lvm2 a--  2.00g    2.00g                
  /dev/vde   testvg        lvm2 a--  2.00g    2.00g 

# lvcreate -L 1G -T testvg/thinlv1 -vvvv
#libdm-config.c:908       Setting activation/monitoring to 1
#lvmcmdline.c:1102         Processing: lvcreate -L 1G -T testvg/thinlv1 -vvvv
#lvmcmdline.c:1105         O_DIRECT will be used
#libdm-config.c:844       Setting global/locking_type to 1
#libdm-config.c:908       Setting global/wait_for_locks to 1
#locking/locking.c:241       File-based locking selected.
#libdm-config.c:813       Setting global/locking_dir to /var/lock/lvm
#libdm-config.c:908       Setting global/prioritise_write_locks to 1
#unknown/unknown.c:102       Initialised segtype: thin
  WARNING: Unrecognised segment type thin
#lvcreate.c:746   Unable to create LV with unknown segment type thin. <-
  Run `lvcreate --help' for more informationat am I missing?

What am I missing?


More information about the linux-lvm mailing list