5–6 Replacing a cache backup battery
Hitachi Unified Storage Hardware Service Guide
Replacing the cache backup battery on a CBL Controller
Box
To replace cache backup batteries on a CBL Controller Box, perform the
following steps:
1. Remove the front bezel. See Removing and replacing the front bezel on
page 3-10.
2. Remove the cache backup battery.
3. Install a new cache backup battery.
4. Replace the front bezel. See Removing and replacing the front bezel on
page 3-10.
Removing the cache battery backup
Use the following procedure to remove the cache battery backup (and see
Figure 5-2 on page 5-7):
1. Remove the Power Unit on which the red ALM LED for the cache backup
battery is ON.
2. Loosen the blue screw that secures the cache backup battery.
3. Open the lever, and then pull out and remove the cache backup battery.
Installing the new cache backup battery
Wait at least 30 seconds after removing the cache backup battery from the
storage system. Then use the following procedure to install the new cache
backup battery.
1. With the lever opened completely, insert the cache backup battery into
the slot.
2. Push the cache backup battery all the way in.
3. Close the lever and tighten the blue screw you loosened earlier to secure
the cache backup battery.
4. Charge the cache backup battery until the green RDY LED on the Power
Unit stops blinking and goes ON. The green RDY LED blinks when the
cache backup battery is charging and then goes ON when the cache
backup battery is fully charged. Charging time takes approximately 3
hours.
NOTE: The cache backup battery is about 19.2 inches (488 mm) deep and
weighs approximately 11 lbs (5.0 kg), so remove it carefully.
NOTE: If you insert the new cache backup battery without waiting at least
30 seconds, it might not recover normally. If this occurs, remove the
inserted cache backup battery from the storage system, wait at least 30
seconds and then re-insert the cache backup battery into the storage
system.
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