In versions earlier than 5.7.0-01, when an I/O request is sent to a path in the Online(E) status despite all paths being disconnected, the status of the path is changed to Offline(E) and another path is placed in the Online(E) status. In version 5.7.0-01 or later, even if an I/O request is sent to a path in the Online(E) status, the status of the path does not change.
In the event of path recovery after all paths have failed, the paths must be placed online by automatic failback or by using a command before you can access the data.