Hi AlbertWT,  Refer: [URL] KB Article: emc290163 is a verified answer.  Ankit
Hi,  I just got this message from my production CX4-240 array:  Event Number 743a Severity Error Host A-IMAGE Storage Array FCNCX087900328 SP A Device N/A Description Navisphere can no longer manage (SP B). This does not impact server I/O to the storage system. See Navisphere Manager Alerts for details.  is this something that I need to worry about or just a warning message ?
Navisphere can no longer manage (SP B). This does not impact server I/O to the 
storage system.