HP StorageWorks 500 G2 Modular Smart Array - Manual (Page 95)

Troubleshooting 95
43 Redundancy Failed Hardware Failure
Type: Error
Description: While either attempting to enter redundant mode or already
operating in redundant mode, one of the controllers encountered a hardware
failure on the communication channel between the two controllers. Redundancy
is disabled at this time.
Action:
If the storage system is currently involved in host I/O:
1. Remove the standby controller.
2. Wait 10 seconds.
3. Reinstall the controller, and be sure that it seats fully in the chassis.
If this action does not solve the problem, wait until downtime is available and do
the following:
1. Power down the storage system (on page 28 ).
2. Remove both controllers.
3. Reinstall both controllers, and be sure that they seat fully in the chassis.
If this action does not solve the problem, contact HP support.