Hi Marcelo,

Is it cold (the VM is down) or live (the VM is up) merge (snapshot deletion)?
What version are you running?
Can you please share engine and vdsm logs?

Please note that at some point we try to verify that image was removed by running getVolumeInfo hence, the volume not found is expected. The thing is, that you say that volume does exist. 
Can you run following command on the host:

vdsClient -s 0 getVolumeInfo <sd> <sp> <img> <vol>

Thank you,
Ala


On Sat, Mar 12, 2016 at 3:35 PM, Marcelo Leandro <marceloltmm@gmail.com> wrote:
I see the log error:
Mar 12, 2016 10:33:40 AM
VDSM Host04 command failed: Volume does not exist:
(u'948d0453-1992-4a3c-81db-21248853a88a',)

but the volume exist :
948d0453-1992-4a3c-81db-21248853a88a

2016-03-12 10:10 GMT-03:00 Marcelo Leandro <marceloltmm@gmail.com>:
> Good morning
>
> I have a doubt, when i do a snapshot, a new lvm is generated, however
> when I delete this snapshot the lvm not off, that's right?
>
> [root@srv-qemu03 93633835-d709-4ebb-9317-903e62064c43]# ls
> 27a8bca3-f984-4f67-9dd2-9e2fc5a5f366  7d9b6ed0-1125-4215-ab76-37bcda3f6c2d
> 3fba372c-4c39-4843-be9e-b358b196331d  b47f58e0-d576-49be-b8aa-f30581a0373a
> 5097df27-c676-4ee7-af89-ecdaed2c77be  c598bb22-a386-4908-bfa1-7c44bd764c96
> 5aaf9ce9-d7ad-4607-aab9-2e239ebaed51
> [root@srv-qemu03 93633835-d709-4ebb-9317-903e62064c43]# ls -l
> total 0
> lrwxrwxrwx. 1 vdsm kvm 78 Mar 12 09:28
> 27a8bca3-f984-4f67-9dd2-9e2fc5a5f366 ->
> /dev/c2dc0101-748e-4a7b-9913-47993eaa52bd/27a8bca3-f984-4f67-9dd2-9e2fc5a5f366
> lrwxrwxrwx. 1 vdsm kvm 78 Mar 12 09:31
> 3fba372c-4c39-4843-be9e-b358b196331d ->
> /dev/c2dc0101-748e-4a7b-9913-47993eaa52bd/3fba372c-4c39-4843-be9e-b358b196331d
> lrwxrwxrwx. 1 vdsm kvm 78 Mar 12 08:44
> 5097df27-c676-4ee7-af89-ecdaed2c77be ->
> /dev/c2dc0101-748e-4a7b-9913-47993eaa52bd/5097df27-c676-4ee7-af89-ecdaed2c77be
> lrwxrwxrwx. 1 vdsm kvm 78 Mar 12 09:23
> 5aaf9ce9-d7ad-4607-aab9-2e239ebaed51 ->
> /dev/c2dc0101-748e-4a7b-9913-47993eaa52bd/5aaf9ce9-d7ad-4607-aab9-2e239ebaed51
> lrwxrwxrwx. 1 vdsm kvm 78 Mar 12 09:12
> 7d9b6ed0-1125-4215-ab76-37bcda3f6c2d ->
> /dev/c2dc0101-748e-4a7b-9913-47993eaa52bd/7d9b6ed0-1125-4215-ab76-37bcda3f6c2d
> lrwxrwxrwx. 1 vdsm kvm 78 Nov 27 22:30
> b47f58e0-d576-49be-b8aa-f30581a0373a ->
> /dev/c2dc0101-748e-4a7b-9913-47993eaa52bd/b47f58e0-d576-49be-b8aa-f30581a0373a
> lrwxrwxrwx. 1 vdsm kvm 78 Mar 11 22:01
> c598bb22-a386-4908-bfa1-7c44bd764c96 ->
> /dev/c2dc0101-748e-4a7b-9913-47993eaa52bd/c598bb22-a386-4908-bfa1-7c44bd764c96
>
>
>
> disks snapshot:
> [root@srv-qemu03 93633835-d709-4ebb-9317-903e62064c43]# qemu-img info
> 27a8bca3-f984-4f67-9dd2-9e2fc5a5f366
> image: 27a8bca3-f984-4f67-9dd2-9e2fc5a5f366
> file format: qcow2
> virtual size: 112G (120259084288 bytes)
> disk size: 0
> cluster_size: 65536
> backing file: ../93633835-d709-4ebb-9317-903e62064c43/b47f58e0-d576-49be-b8aa-f30581a0373a
> backing file format: raw
> Format specific information:
>     compat: 0.10
>     refcount bits: 16
>
>
> [root@srv-qemu03 93633835-d709-4ebb-9317-903e62064c43]# qemu-img info
> 3fba372c-4c39-4843-be9e-b358b196331d
> image: 3fba372c-4c39-4843-be9e-b358b196331d
> file format: qcow2
> virtual size: 112G (120259084288 bytes)
> disk size: 0
> cluster_size: 65536
> backing file: ../93633835-d709-4ebb-9317-903e62064c43/b47f58e0-d576-49be-b8aa-f30581a0373a
> backing file format: raw
> Format specific information:
>     compat: 0.10
>     refcount bits: 16
>
> [root@srv-qemu03 93633835-d709-4ebb-9317-903e62064c43]# qemu-img info
> 5aaf9ce9-d7ad-4607-aab9-2e239ebaed51
> image: 5aaf9ce9-d7ad-4607-aab9-2e239ebaed51
> file format: qcow2
> virtual size: 112G (120259084288 bytes)
> disk size: 0
> cluster_size: 65536
> backing file: ../93633835-d709-4ebb-9317-903e62064c43/b47f58e0-d576-49be-b8aa-f30581a0373a
> backing file format: raw
> Format specific information:
>     compat: 0.10
>     refcount bits: 16
>
>
> disk base:
> [root@srv-qemu03 93633835-d709-4ebb-9317-903e62064c43]# qemu-img info
> b47f58e0-d576-49be-b8aa-f30581a0373a
> image: b47f58e0-d576-49be-b8aa-f30581a0373a
> file format: raw
> virtual size: 112G (120259084288 bytes)
> disk size: 0
>
>
> Thanks.
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