HP 5300 - Manual (Page 19)

Board Components and Features
HP Smart Array 5300 Controller User Guide 1-7
HP CONFIDENTIAL
Writer: Jennifer Hayward File Name: b-ch1 board components
Codename: SilverHammer Part Number: 135606-005 Last Saved On: 10/8/02 11:08 AM
Figure 1-5: Battery packs
This data protection (and the time limit) also applies if an equipment failure or power
outage occurs. When power is restored to the system, an initialization process writes
the preserved data to the hard drives.
The batteries are continuously recharged using a trickle-charging process whenever
the system power is on. Under normal operating conditions, a battery pack lasts for
three years before replacement is necessary.
IMPORTANT: The batteries on a new array controller may have a low charge when the
controller board is first installed. In this case, a Power-On Self-Test (POST) message 1794 is
displayed when the server is powered up (refer to Appendix G), indicating that the array
accelerator is temporarily disabled. No action is required on your part, since the internal
circuitry automatically recharges the batteries and enables the cache. The recharge process
takes less than four hours. The array controller will function properly during this time, although
without the performance advantage of the array accelerator. When the batteries are charged to
an acceptable capacity, the array accelerator is automatically enabled.
For battery replacement instructions, refer to Chapter 9.