Hi Callum,
your LVM thin pool seams to be full.
Try to trim it with: fstrin -av.
Am 12.07.2018 um 13:13 schrieb Callum Smith
<callum(a)well.ox.ac.uk>:
'lvcreate', '--thin', '--virtualsize', u'349121282048B',
'--name', 'ovirt-node-ng-4.2.4-0.20180626.0',
u'onn_virta003/pool00']'