Battery-Backed Write Cache - HP ProLiant DL580 Generation 3 User Manual

72 HP ProLiant DL580 Generation 3 Server User Guide
3. Connect the power cord to the redundant power supply.
4. Secure the power cords to the retaining clip.
5. Connect the power cord to the power source.
6. Be sure that the power supply LED is green ("Power supply LEDs" on page
18).
7. Be sure that the front panel external health LED is green ("Front panel LEDs
and buttons" on page 11).

Battery-Backed Write Cache

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.
For information on BBWC LEDs, refer to "BBWC LEDs (on page 35)."
IMPORTANT: For maximum server availability, be sure that the
two power supplies are powered by separate AC power sources.
NOTE: If the server will be shipped to another location after
configuration, install a shipping screw into each power supply.
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 will be lost if the cable is detached.