Hitachi CBL, Hardware Service Manual

Page: 171 / 292

Adding and replacing controllers
8–7
Hitachi Unified Storage Hardware Service Guide
Replacing the controller in CBXSS/CBXSL/CBSS/CBSL
Controller Boxes
To replace a controller in CBXSS/CBXSL/CBSS/CBSL Controller Boxes,
perform the following steps:
1. Remove the faulty controller from the storage system.
2. Remove the cache memory and Host I/O Board from the faulty
controller.
3. Install the cache memory and Host I/O Board on the replacement
controller.
4. Install the new controller into the storage system.
Removing the faulty controller
To remove the faulty controller from the storage system:
1. Be sure the red ALM LED is ON at the controller to be replaced.
2. Loosen the right and left blue screws.
3. Open the right and left levers forward. When the levers are opened
completely, the controller can be removed.
4. Remove all the cables connected to the controller. If the Drive Box is
connected, remove the SAS (ENC) cable.
5. Slide the controller forward and then remove it.
6. Place the old controller on a flat surface with its safety label facing up,
and remove the six screws that secure the cover to the controller.
Remove the cover by sliding it in the direction shown by the arrow ( ⎯→ ).
Removing cache memory and Host I/O Board from the old controller
Use the following procedure to remove the cache memory and Host I/O
Board from the controller you removed (and see Figure 8-3 on page 8-9 ):
1. Orient the controller so its safety label faces up. Then loosen the two
blue screws at the rear of the controller and slide the cover in the
direction shown by the arrow ( ⎯→ ) and remove it.
2. Before removing the cache memory, record the slots where it is
installed, as you will need to install the same modules in the equivalent
slots in the new controller.
3. Push the slot levers that secure the cache memory.
NOTE: If the cable cannot be removed easily, do not pull it by force.
Otherwise, you can damage the cable. When removing Fibre Channel
Interface cables, pull out the cables completely from the host connectors.
If the Fibre Channel Interface cables are inserted halfway into the host
connectors, the controller continues to detect Fibre Channel failures and
I/O processing can deteriorate.