Hello, [Context : I'm moving all my VMs from an old 3.6 DC to a brand new 4.3 DC. For local reasons, I'm doing it using an export domain, and one by one. ] Today, for no obvious reason, error messages began to appear : " VDSM SPM-servername command failed: Logical Volume extend failed " Lots of similar errors appear in the engine log, with no obvious additional hint. In the VDSM log, I'm not skilled enough to see what's wrong either. The 3.6 engine and vdsm log files are here : https://framadrop.org/r/6cFSb0GRc1#VQ6XqYWg9HzniHMjgKmXVpXy0I+RIS/MiMGBpU... https://framadrop.org/r/JFswiD3fkA#fdU+m3JCVMVg/eLjtJVTqOiAKIj4eyhsRWisxc... It may come from one of our storage domain that was close to full, but I freed 200Go space since, and the issue keeps appearing. Now, my attempts to export a VM are failing. I still can stop and start a VM. (I'm not completely relaxed with this situation.) I read some similar experience here (https://www.canarytek.com/2017/07/21/Harmfull_bug_in_oVirt_block_storage....) but I'm not sure it is related. I can psql-query and check things if needed, but I mostly need advices. Thank you. -- Nicolas ECARNOT