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BugZero found this defect 740 days ago.
This article documents how to convert a Disk from RAW to QCOW2, allowing Veeam Backup for Oracle Linux Virtualization Manager and Red Hat Virtualization to create an incremental backup of the disk. As documented in the Veeam Backup for Oracle Linux Virtualization Manager and Red Hat Virtualization User Guide, Incremental Backup requires that "the disk is formatted in QCOW2 format."
Starting with oVirt version 4.5, RHV REST API can be used to convert a RAW disk to QCOW2 format. For more information, review: oVirt REST API documentation - disk - convert POST Example API request: curl \ --cacert '/etc/pki/ovirt-engine/ca.pem' \ --user 'admin@internal:mypassword' \ --request POST \ --header 'Version: 4' \ --header 'Content-Type: application/xml' \ --header 'Accept: application/xml' \ --data ' <action> <disk> <sparse>true</sparse> <format>cow</format> </disk> </action> ' \ https://<myengine.example.com>/ovirt-engine/api/disks/<disk id>/convert
As an alternate way to convert the disks, back up the VM that has RAW disks using Veeam Backup for Oracle Linux Virtualization Manager and Red Hat Virtualization and then restore the VM disks in the QCOW2 format.