HP Integrity rx4640 Server - Manual (Page 24)

Upgrading or replacing controller options 24
11. Pull the right hand portion of the battery case away from the battery, and simultaneously rotate the
battery pack into the opening.
12. Connect the battery cable to the battery and the cache. Route the battery cable so that the cache
and battery can be removed together. (If you need to remove the cache to transfer data, the battery
must remain connected to it so that the data is preserved.)
13. Insert the battery case into the hard drive slot.
14. Close the server access panel.
15. Reinstall the server in the enclosure.
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 is
recharging, although the performance advantage of the array accelerator is absent. When the battery
pack has been charged to a predetermined level, the array accelerator is automatically enabled.
Replacing a P800 cache battery
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 44 ).
o If the LED is blinking every 2 seconds, data is trapped in the cache. Restore system power, and
then 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 51 )" before installing or
removing any item that contains a battery pack.