@Darkbeldin I checked the xensource.log on the server and found the error message "failed with exception Server_error(INVALID_DEVICE, [ autodetect ])" during export, similar to the post here: https://xcp-ng.org/forum/topic/4319/invalid_device-autodetect-during-backup I checked the XO dashboard health and found 256 "Pool Metadata Backup" VDIs attached to Control Domain. Not sure how or why the "Pool Metadata Backup" got stuck attached to Control Domain but I guess it has reached the 256 limit. I "Forget" all of them and full backup seems to be working now. For the record, it wasn't anything to do with snapshots. The VM was OFF so I guess it doesn't need to take a snapshot before transfer hence the log doesn't mention snapshot.

@danp Thanks for the tips... Ran the command to do a force rebuild and started up ok now... sudo curl https://raw.githubusercontent.com/Jarli01/xenorchestra_updater/master/xo-update.sh | bash -s -- -f

@deoccultist Not much I can add there, it looks like a system error between your XOA and the remote. What kind of remote are you using? Does this happen often? Have you tried restarting xo-server or the OS?

@nraynaud @olivierlambert Thanks guys!

Yep, that's the best solution Have a nice day.

Thanks for the tip. I was using node v8.11.4 and had issues compiling during the upgrade then upgraded to the latest stable node version which wasn't v8.x. I upgraded to v8.16.2 now and it runs fine. Thanks.