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Removal and replacement procedures 64
Removing the FBWC capacitor pack
CAUTION: After the server is powered down, wait 15 seconds and then check the amber LED
before unplugging the cable from the cache module. If the amber LED blinks after 15
seconds, do not remove the cable from the cache module. The cache module is backing up
data, and data is lost if the cable is detached.
CAUTION: Do not detach the cable that connects the battery pack to the cache module.
Detaching the cable causes any unsaved data in the cache module to be lost.
To remove the component:
1. Power down the server (on page 26).
2. Extend the server from the rack (on page 27).
3. Remove the access panel (on page 28).
4. If the existing cache is connected to a battery, observe the FBWC Status LED ("FBWC module LEDs"
on page 88).
o If the LED is flashing every 2 seconds, data is still trapped in the cache. Restore system power,
and then repeat the previous steps.
o If the LED is not illuminated, disconnect the battery cable from the cache.
5. Disconnect the cable.
6. Remove the battery pack.