it is nfs3 based and I did an upgrade from RHEL 6.8 -> 6.9 and rebooted the storage. I paused all running vms but forgot to put the storage domains into maintenance.
scratch-inf[0]:/export/scratch/ovirt# ls -lr * iso: total 0 -rwxr-xr-x. 1 36 kvm 0 29. Mai 18:02 __DIRECT_IO_TEST__ drwxr-xr-x. 4 36 kvm 32 21. Jul 2015 2851dcfe-3f64-408a-ad4a-c416790696eb export: total 0 -rwxr-xr-x. 1 36 kvm 0 29. Mai 16:28 __DIRECT_IO_TEST__ drwxr-xr-x. 5 36 kvm 45 21. Jul 2015 4cda1489-e241-4186-9500-0fd61640d895 data: total 0 -rwxr-xr-x. 1 36 kvm 0 29. Mai 18:02 __DIRECT_IO_TEST__ drwxr-xr-x. 5 36 kvm 45 23. Jul 2015 c17d9d7f-e578-4626-a5d9-94ea555d7115 scratch-inf[0]:/export/scratch/ovirt# exportfs -v | grep ovirt /export/scratch/ovirt @ovirt-scratch(rw,async,wdelay,no_root_squash,no_subtree_check,fsid=200,sec=sys,rw,no_root_squash,no_all_squash) I can write on nfs from all nodes as root (did not try with uid 36 but don't see why it shouldn't work) Cheers, Mo