hp StorageWorks NAS e7000 v2 Maintenance and Service Guide

Connectors, LEDs, and Switches

103NAS e7000 v2 Maintenance and Service Guide

Battery-Backed Write Cache Enabler

When the battery-backed write cache (BBWC) enabler is connected to the controller and the

server is powered on, the green LED indicates the battery charge status. When the battery is

connected to the controller and the server is powered down, the amber LED indicates the data

retention status. Figure 72 and Table 27 identify the location and status of the LEDs.

Figure 72: Battery-backed write cache enabler LEDs

Note: The battery will take 24 hours to charge for the first time.

Table 27: Battery-Backed Write Cache Enabler LEDs

Server Status LED Color LED Status Battery Module Status

Server is on and has

normal run time.

Green On Fast charging

Green Off Trickle charging

Amber On Short in the connection of one

or more of the four button cells

within the battery module

Amber Blinking Open in the circuit between the

positive and negative terminals

of the battery module

Server is on and is in the

first 30 seconds after

power up.

Amber or

green

On Temporary lock-out state; data

is lost due to cable being

detached

Server is off and is in data

retention mode.

Amber Blinking every

15 seconds

User data held in write cache is

being backed up