ISM reported the alarm:LUN ID 2 can not found the redundancy path, and the Host ID cannot be recognized on ISM.
1. check the storage controller status were normal.
2. the Only issue that is the Host ID cannot be recognized on ISM as below：
3： we retry to re-scan the LUN on Host and issue solved.
In the disk manager tool you needs to rescan the disk and then the server must be able to see the LUN again, every time that the server being rebooted or the FC connection be disconnected and connected again(from the server or storage device), the disk must be rescan in order to find the path which the LUN belongs.