Battery-Backed Write Cache Enabler - Compaq 230039-001 - StorageWorks NAS Executor E7000 Model 904 Server Maintenance And Service Manual

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: Battery-backed write cache enabler LEDs
Note:
Table 27: Battery-Backed Write Cache Enabler LEDs
Server Status
Server is on and has
normal run time.
Server is on and is in the
first 30 seconds after
power up.
Server is off and is in data
retention mode.
NAS e7000 v2 Maintenance and Service Guide
Figure 72 and
1
2
The battery will take 24 hours to charge for the first time.
Table 27 identify the location and status of the LEDs.
LED Color LED Status
Green On
Green Off
Amber On
Amber Blinking
Amber or On
green
Amber Blinking every
15 seconds
Connectors, LEDs, and Switches
Battery Module Status
Fast charging
Trickle charging
Short in the connection of one
or more of the four button cells
within the battery module
Open in the circuit between the
positive and negative terminals
of the battery module
Temporary lock-out state; data
is lost due to cable being
detached
User data held in write cache is
being backed up
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