Trouble description:
The users detected that the status of controller at A is unknown.
Analysis and diagnostic:
Physical observed all leds on enclosure of disk array is normal.
The controller may be causing problem but can not return the true state itself.
Recommendation:
Replace a new controller.

Announcement:
=====================================================================
According to HP official Service Guide, the controller of HP FC60 is a Hot-Swappable component,so it could be replaced online.

To maintain data integrity and reduce risk during array controller replacement, we highly recommend that the users backup the whole data of array before replacement.
=====================================================================

THE PROCEDURE OF HP FC60 CONTROLLER REPLACEMENT:
1. Check the states of array and locate the unknown or failed controller
# su - root
# amdsp -i /* get array id*/
# amdsp -a <array id>


2. Change the LUNs ownership to the normal controller
If the controller state is unknown,you must change LUN ownership to the normal controller.
# amdsp -l <array id> /*list status of all LUNs on array*/
# amcfg -M <LUN id> -c <controller id> <array id> /*To change LUN ownership to another controller*/

3. Set state of unknown controller to failed
# amutil -C <controller id> <Array id> /*To change a controller state to failed*/


4. Physical remove and replace the failed controller

5. Change Failed controller to Unfailed
# amutil -c A <array id>


6. Change the LUNs ownership to the replaced controller
# amcfg -M <LUN id> -c <controller id> <array id> /*To change Lun ownership to the replaced controller*/

Thanks for sharing!

All the best

thankyou vbe!
i have a question about why I checked LUNs status after replaced that all luns only run on the controller A,no LUN runs on the controller B.

Can FC60 transfer LUNs to a normal controller when detected another controller failed or not normal itself.

Thank you!

Not sure I understood...
If you were thinking of High availability capacities, though I dont dont know how (I always used XP/HDS subsystems...) it can be done If you believe (extract...):
from http://h20000.www2.hp.com/bc/docs/su...5/lpg28375.pdf
page 104.

Thank you VBE!
i've discussed this topic with my team mates.

Thanks again!