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Component identification 99
Battery pack LEDs
Item Color Description
1
Green System Power LED. This LED is on when the system is
powered up and 12 V system power is available. This
power supply is used to maintain the battery charge and
provide supplementary power to the cache microcontroller.
2
Green Auxiliary Power LED. This LED is on when 3.3V auxiliary
voltage is detected. The auxiliary voltage is used to
preserve BBWC data and is available any time that the
system power cords are connected to a power supply.
3
Amber Battery Health LED. To interpret the illumination patterns of
this LED, see the following table.
4
Green BBWC Status LED. To interpret the illumination patterns of
this LED, see the following table.
LED3 pattern LED4 pattern Interpretation
Off
Flashing (2 Hz)
The system is powered down, and the cache contains data that has not
yet been written to the drives. Restore system power as soon as
possible to prevent data loss.
Data preservation time is extended any time that 3.3 V auxiliary
power is available, as indicated by LED 2. In the absence of auxiliary
power, battery power alone preserves the data. A fully-charged
battery can normally preserve data for at least 2 days.
The battery lifetime also depends on the cache module size. For more
information, see the controller QuickSpecs on the HP website
(http://www.hp.com).
Off
Double flash, then
pause
The cache microcontroller is waiting for the host controller to
communicate.