On Thu, Jan 12, 2023 at 3:15 PM Arik Hadas <aha...@redhat.com> wrote:

> ovirt-engine intentionally blocks sparsifying QCOW images since 4.4.4
> because it confused users that didn't see the right amount of free space
> afterwards, see the following bug for more details:
> https://bugzilla.redhat.com/show_bug.cgi?id=1792905
>

Sorry, what I wrote above is incorrect - the space was indeed reclaimed and
so the free space was correct but the image size didn't change (so if you
don't care about the size of the image that you see in oVirt and you need
to free space, it's fine to invoke it manually)


>
>
> On Thu, Jan 12, 2023 at 3:03 PM <andreas_nikifo...@hotmail.com> wrote:
>
>> Unfortunately yes, even VM's/disks on the NFS data domain are giving the
>> same error.
>>
>> Just to be sure, i just created a completely new NFS data share on
>> Truenas imported the data domain to ovirt and created a new test vm with 2
>> thin provisioned disks on it, cannot sparsify neither:
>>
>> "Error while executing action: Cannot sparsify Virtual Disk. Sparsifying
>> is not supported for QCOW2 disk testvm3_Disk1."
>>
>> I checked the NFS share on Truenas to make sure i have a sparse qcow2
>> file and it is:
>>
>> -rw-rw---- 1 vdsm ovirt-kvm  24G Jan 12 12:57
>> a0f82c8b-d2aa-442b-b28b-b25ca684dd7b
>> -rw-rw---- 1 vdsm ovirt-kvm 1.0M Jan 12 12:44
>> a0f82c8b-d2aa-442b-b28b-b25ca684dd7b.lease
>> -rw-r--r-- 1 vdsm ovirt-kvm  307 Jan 12 12:44
>> a0f82c8b-d2aa-442b-b28b-b25ca684dd7b.meta
>> root@truenas[.../29dcdef7-8d1d-48bc-b9cf-3850102ec251]# file
>> a0f82c8b-d2aa-442b-b28b-b25ca684dd7b
>> a0f82c8b-d2aa-442b-b28b-b25ca684dd7b: QEMU QCOW2 Image (v3), 26843545600
>> bytes
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>
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