Upstream (non-Oracle) oVirt is not validated. Only Oracle OLVM is supported.

There is no per-tenant OLVM concurrency quota. Concurrency is bounded by existing NetBackup global controls.

The asynchronous transfer buffer pool is allocated per job and is not shared across concurrent jobs.

Supported storage domain types are NFS, Fibre Channel (FC), and iSCSI.

Incrementals will back up full disk data for read-only disks.

Backup of a VM with a read-only disk fails during the snapshot phase when the VM's compatibility version does not enable hybrid backup. This failure affects the entire VM backup, not just the read-only disk. Without hybrid backup, OLVM falls back to the libvirt backup API, which does not support including a read-only disk in a backup.

Backups of VMs with read-only disks are supported only when the VM has cluster compatibility version 4.7 or higher (where hybrid backup is enabled).

Recommended action: Raise the cluster's (or the VM's) compatibility version to a level that enables hybrid backup, or clear the disk's read-only attribute if the guest does not require it.

Backup of a running OLVM VM with a read-only disk can fail, depending on how the disk's incremental backup setting is configured:

Recommended action: Clear the Read Only attribute on the disk attachment, in the OLVM Administration Portal under Compute > Virtual Machines > virtual machine > Disks. This is the only option that allows both full and incremental backups to succeed.

If the disk must remain read-only, select Enable Incremental Backup on it, and do one of the following: