[dm-devel] Cannot delete lvm thin volume

[Heinz Mauelshagen]

Nikolay,

this is a question for linux-lvm.

You're saying the fs is not mounted but the lv is open as of
your lvdisplay output, thus you can't lvremove it.


Heinz


On 10/16/2015 02:24 PM, Nikolay Borisov wrote:
> Hello I have the following thin volume, which I'd like to delete:
>
> lvdisplay -v /dev/coregroup/c13537_2k
>      Using logical volume(s) on command line.
>    --- Logical volume ---
>    LV Path                /dev/coregroup/c13537_2k
>    LV Name                c13537_2k
>    VG Name                coregroup
>    LV UUID                LBPr0i-uac8-i3Co-5B3M-A6Bv-q8iv-kSRLRr
>    LV Write Access        read/write
>    LV Creation host, time xxxxx.net, 2015-10-14 02:02:45 -0500
>    LV Pool name           corepool
>    LV Status              available
>    # open                 1
>    LV Size                1.80 TiB
>    Mapped size            42.11%
>    Current LE             471808
>    Segments               1
>    Allocation             inherit
>    Read ahead sectors     auto
>    - currently set to     256
>    Block device           252:6
>
> dmsetup info coregroup-c13537_2k
> Name:              coregroup-c13537_2k
> State:             ACTIVE
> Read Ahead:        256
> Tables present:    LIVE
> Open count:        1
> Event number:      1
> Major, minor:      252, 6
> Number of targets: 1
> UUID: LVM-M8PwSxzGcsZQTtdgzfixsr08ZAlNpAbALBPr0iuac8i3Co5B3MA6Bvq8ivkSRLRr
>
> dmsetup status
> coregroup-c13537_2k: 0 3865051136 thin 1627684864 3865042943
>
> The version of the software is:
> lvremove --version
>    LVM version:     2.02.118(2)-RHEL6 (2015-09-08)
>    Library version: 1.02.95-RHEL6 (2015-09-08)
>    Driver version:  4.26.0
>
> And the kernel is 3.12.47.
>
> When I run 'lvremove -f /dev/coregroup/c13537_2k' I get the following
> error: Logical volume coregroup/c13537_2k contains a filesystem in use.
> I also get the same error when I try to deactivate the volume.
>
> fuser doesn't report anything and the volume is not mounted anywhere. I
> have also acquired an ftrace trace from executing lvremove but there are
> multiple invocation of the dm_ioctl function and I'm not sure which one
> is the relevant. So if you tell me what information in particular you
> need I'd post it here.
>
> Regards,
> Nikolay
>
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