HP ProLiant xw460c Blade Workstation - Manual (Page 33)

Hardware options installation 33
Smart Array E200i Battery-Backed Write Cache enabler
option
The optional BBWC enabler provides the system with a means for storing and saving data in the event of
an unexpected system shutdown.
CAUTION: To prevent a server blade 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 blade is powered down, wait 15 seconds and then check the amber LED
before removing the battery from the cache module. If the amber LED flashes after 15 seconds, do not
remove the battery from the cache module. The cache module is backing up data, and data is lost if the
battery is detached before the LED is extinguished.
IMPORTANT: The battery pack might have a low charge when installed. In this case, a POST error
message is displayed when the server blade 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.
NOTE: The data protection and the time limit also apply if a power outage occurs. When power is restored
to the system, an initialization process writes the preserved data to the hard drives.
To install the component:
1. Power down the server blade (on page 13 ).
2. Remove the server blade (on page 14 ).
3. Remove the access panel (on page 14 ).
4. Remove all hard drives (" Hard drive option " on page 20 ).
5. Remove the hard drive backplane.