
Use just md<index> as the default volume name if a volume name is not defined. The original change (https://review.opendev.org/c/openstack/ironic-python-agent/+/853182) introduced an error: mdadm: Value "/dev/md0" cannot be set as name. Reason: Not POSIX compatible.\n This change fixes it. Closes-Bug: #2073406 Change-Id: Ic8bd473801fcb92fc814f6ad4e1d6dc316783bf3