Hi Morten,
My understanding of thin disks on a block domain is that vdsm traps
ENOSPC on the thin lv and uses the mailbox to get the SPM to extend
it.   See a presentation by Nir
http://www.ovirt.org/File:Storage-mailbox.odp
I thought I saw somewhere there were some changes/bugs around that for
allowing mixed data centers (both block and file domains). ...just
looked now and this bz looks relevant
https://bugzilla.redhat.com/show_bug.cgi?id=1083476


So maybe you could check the engine logs and spm logs for that flow
(sorry I can't tell you any specifics about what you should look for )

-John

On Fri, May 16, 2014 at 1:54 AM, Morten A. Middelthon <mor...@flipp.net> wrote:
> Hi,
>
> I just re-ran the test with adding a preallocated disk, and the problem did
> _not_ appear. I tried a few times to write large files with dd, but the vm
> continued to run without problems
>
> with regards,
>
>
> --
> Morten A. Middelthon
> Email: mor...@flipp.net
> Phone: +47 907 83 708
> _______________________________________________
> Users mailing list
> Users@ovirt.org
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