After you disconnect an external system or volumes, you must reconnect them before you can start using them again.
When you reconnect external systems or volumes, the preserved mapping settings and path statuses are compared to the current statuses. When the statuses and settings match, each volume is mapped, placed in Normal status, and is available for I/O operations. However, if an external volume is not ready to be resumed, the status of the disconnected volume is Blockade. If this problem occurs, see General troubleshooting.