Thanks for the fast reply guys.
I raised a Bug report for the other issue:
Am 11.07.2019 um 18:08 schrieb Ján Tomko <jtomko(a)redhat.com>:
On Thu, Jul 11, 2019 at 05:19:03PM +0200, Peter Krempa wrote:
> On Thu, Jul 11, 2019 at 16:46:29 +0200, Julian Sternberg wrote:
[...]
>> Seconds strange behavior is as follow:
>> virsh vol-create-as vm_volumes test.img --capacity 1G --format raw
>> error: Failed to create vol test.img error: unsupported configuration: only RAW
volumes are supported by this storage pool
>
> So this is really weird. The error message is produced if the target
> format is not 'raw' but the above command clearly supplies it.
>
> I'd suggest you collect debug logs while trying both and attach them
> here. Unfortunately I don't see what could be wrong here.
This is a known bug waiting to be fixed:
https://bugzilla.redhat.com/show_bug.cgi?id=1724065
Jano