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Upgrade and replacement procedures 70
b.
Push the clip firmly at both ends (2) until it clicks into place under the controller board.
13. Reinstall the controller in the server.
After installing a battery pack, you might see a POST message during reboot indicating that the array
accelerator (cache) is temporarily disabled. This behavior is normal because the new battery pack is likely to
have a low charge. You do not need to take any action, because the recharge process begins automatically
when the battery pack is installed. The controller operates properly while the battery pack recharges,
although the performance advantage of the array accelerator is absent. When the battery pack has been
charged to a satisfactory level, the array accelerator is automatically enabled.
Replacing the P800 cache module or controller
CAUTION: Electrostatic discharge can damage electronic components. Be sure you are properly
grounded before beginning this procedure.
1. Close all applications, and then power down the server. This procedure flushes all data from the cache.
2. Observe the BBWC Status LED ("Battery pack LEDs" on page 28).
o If the LED is blinking every 2 seconds, data is trapped in the cache. Restore system power, and
repeat the previous steps in this procedure.
o If the LED is not lit, proceed with the next step.
WARNING: There is a risk of explosion, fire, or personal injury if the battery pack is not properly
handled. Refer to "Battery replacement notice (on page 93)" before installing or removing any
item that contains a battery pack.
3. Remove the controller from the server.