Hitachi CBXSS - Replacing the Cache Backup Battery on CBXSS;CBXSL;CBSS;CBSL Controller Boxes

Replacing a cache backup battery 5–3
Hitachi Unified Storage Hardware Service Guide
Replacing the cache backup battery on CBXSS/CBXSL/
CBSS/CBSL Controller Boxes
Two cache backup batteries on a CBXSS/CBXSL/CBSS/CBS Controller Box
are installed in a Power Unit. When the storage system power is turned on
(Ready status), two cache backup batteries cannot be replaced at the same
time.
To replace cache backup batteries on a CBXSS/CBXSL/CBSS/CBS Controller
Box, perform the following steps:
1. Remove the Power Unit.
2. Remove the old cache backup battery from the Power Unit.
3. Install a new cache backup battery.
4. Insert the Power Unit into the storage system.
Removing the Power Unit
Use the following procedure to remove the Power Unit on which the red B-
ALM LED for the cache backup battery is ON (and see Figure 5-1 on page 5-
5).
1. Hold up the latch on the Power Unit cable holder to release the lock, and
then slide the cable holder forward.
2. Remove the power cable from the Power Unit on which the red B-ALM
LED for the cache backup battery is ON.
3. Open the lever (
?) toward you while pressing the latch on the Power Unit
inward with right thumb (
c). When the lever is opened completely, the
Power Unit can be removed by pulling it forward.
4. Hold the body of the Power Unit with both hands, and then pull out and
remove the Power Unit.
Removing the cache backup battery
Use the following procedure to remove the cache backup battery (and see
Figure 5-1 on page 5-5):
1. Loosen the blue screw on the cache backup battery cover, and then open
the cover.
2. Remove the cable for the cache backup battery from the cable clamp.
3. Remove the cable for the cache backup battery from the connector on
the Power Unit.
4. Remove the cache backup battery.
Installing a new cache backup battery
Use the following procedure to install a new cache backup battery (and see
Figure 5-1 on page 5-5):
1. Insert a new cache backup battery on the Power Unit, and then connect
the cable for the cache backup battery to the connector on the Power
Unit.