Hardware options installation 64
The BBWC consists of two parts: a battery pack and a storage cache module.
Along with the cache module, the battery pack provides transportable data protection, increases overall
controller performance, and maintains any cached data for up to 72 hours after the server loses power. The
NiMH batteries in the battery pack are continuously recharged through a trickle-charging process whenever
the system power is on.
CAUTION: To prevent a server malfunction or damage to the equipment, do not add or remove
the battery pack while an array capacity expansion, RAID level migration, or stripe size migration
is in progress.
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.
IMPORTANT: The battery pack might have a low charge when installed. In this case, a POST
error message is displayed when the server is powered up, indicating that the battery pack is
temporarily disabled. No action is necessary on your part. The internal circuitry automatically
recharges the batteries and enables the battery pack. This process might take up to four hours.
During this time, the cache module functions properly, but without the performance advantage of
the battery pack.
To install the component:
1. Close all applications, and power down the server (on page 25). This procedure flushes all data from
the cache.
2. Extend the server from the rack (on page 25).
3. Remove the access panel (on page 26).
4. Remove the SPI board (on page 28).
5. Install the cache module.
