Dismount the Target System Disk Elsewhere in the Cluster

Before installing OpenVMS on a target drive in an OpenVMS Cluster, make sure the target system disk is not mounted elsewhere in the cluster. The target system disk must be dismounted clusterwide (except on the system from which the installation is being performed) and must remain so during the installation. For instructions on dismounting cluster disks, see “Preparing Your System for a Rolling Upgrade”.