From mboxrd@z Thu Jan  1 00:00:00 1970
Message-ID: <51ED2268.7030702@redhat.com>
Date: Mon, 22 Jul 2013 14:15:36 +0200
From: Zdenek Kabelac <zkabelac@redhat.com>
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Subject: Re: [linux-lvm] lvcreate --thin gives "unknown segment type" error
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To: LVM general discussion and development <linux-lvm@redhat.com>
Cc: Kumar amit mehta <gmate.amit@gmail.com>

Dne 22.7.2013 07:15, Kumar amit mehta napsal(a):
> Hi,
>
> 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
> 2.6.32-358.el6.x86_64
>
> # 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?
>

configure --with-thin=internal

(and you will likely miss  '--enable-udev_sync'

Zdenek