HP NetRAID 2M Battery Replacement Installation

HP NetRAID-2M Battery Backup Unit

The Battery Backup Unit preserves data handled by the HP NetRAID-2M adapter

by providing protection from power supply interruptions to the HP NetRAID

cache memory.

The HP NetRAID Battery Backup Unit monitors the voltage level of the DRAM

modules installed on the HP NetRAID-2M adapter and supporting circuitry. If

the voltage drops below a predefined level, the Battery Backup Unit switches the

memory power source from the adapter to the battery pack attached to the

adapter. As long as the voltage level is below the predefined value, the

HP NetRAID Battery Backup Unit provides the memory refresh cycles necessary

to retain the contents of the HP NetRAID-2M memory modules. If the voltage

level returns to an acceptable level, the Battery Backup Unit switches the power

source back to the HP NetRAID-2M adapter.

Charging the Battery

The battery pack is shipped precharged, and it recharges automatically.

NOTE The full data retention time is not available unless the battery

pack is fully charged. If the battery pack is not fully charged,

set the HP NetRAID cache write policy option to

Write-Through while charging the battery pack. After the

battery pack is fully charged, you can change the cache write

policy to Write-Back.