vzdump do not check NFS drive before and during backup and do not unlock VMs on drive error
Proposed fixes:
1) Before locking each vm in list check storage free space and storage is writable
2) Stop backup and unlock VM on any backup error
3) Optional. Stop backup of other VMs on storage error
4) After backup was finished check that VMs is not locked
Proposed fixes:
1) Before locking each vm in list check storage free space and storage is writable
2) Stop backup and unlock VM on any backup error
3) Optional. Stop backup of other VMs on storage error
4) After backup was finished check that VMs is not locked