@flakpyro we are working on a fix here : https://github.com/vatesfr/xen-orchestra/pull/9702 . Are you using NBD ?
we think pierre's diag is right , so this branch will not open the NBD server when needed, and wait for the disk to be disconnecetd before trying to write into it
fbeauchamp opened this pull request in vatesfr/xen-orchestra
open
fix(backups): Fix "Storage_error ([S(Illegal_transition);[[S(Activated);S(RO)];[S(Activated);S(RW)]]])"
#9702
Different use cases: Ceph is better with more hosts (at least 6 or 7 minimum) while XOSTOR is better between 3 to 7/8.
We might have better Ceph support in the future for large clusters.