HP ProLiant DL585 G2 Server - Manual (Page 51)

Hardware options installation 51
b. Install the battery pack into the server.
10. Route the cable, and connect it to the cache module.
NOTE: After installing a battery pack, you might see a POST message during reboot
indicating that the array accelerator (cache) is temporarily disabled. This 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 will operate properly while the battery pack recharges, although the performance
advantage of the array accelerator will be absent. When the battery pack has been charged
to a satisfactory level, the array accelerator will automatically be enabled.