HP DL785 - Manual (Page 74)

System maintenance switch (SW1)
CAUTION: All supported AMD Opteron quad-core processors 3.1 GHz or greater and all
supported AMD Opteron six-core processors require the system maintenance switch, located on
the I/O backplane, (SW1) position 5 to be in the On position.
HP recommends updating to the latest version of firmware. Earlier firmware versions might not
validate the required switch setting for these processors.
Battery pack LEDs
Description Color LED Item ID
To interpret the illumination patters of this LED, see Table 5-2 (page 74) Green BBWC status 1
To interpret the illumination patters of this LED, see Table 5-2 (page 74) Amber Battery health 2
This LED glows solid when 3.3 V auxiliary voltage is detected. The auxiliary
voltage preserves BBWC data and is available any time that the system
power cords are connected to a power supply. Green Auxiliary
power 3
This LED glows solid when the system is powered up and 12 V system
power is available. This power supply maintains the battery charge and
provides supplementary power to the cache microcontroller. Green System power 4
Table 5-2 Battery health and BBWC status LED patterns
Interpretation LED 4 pattern LED 3 pattern
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 fullycharged battery can normally preserve
data for at least two days.
The battery lifetime also depends on the cache module size. For further
information, refer to the controller QuickSpecs on the HP website
(
http://www.hp.com ).
Flashing (1/2 Hz)
None
The cache microcontroller is waiting for the host controller to communicate. Double flash, then
pause
None
74 Component identification