HP Integrity rx4640 Server - Manual (Page 6)

Hardware features 6
Expansion module components
An expansion module is used to add two extra external channels to an SA6402 controller, converting it to
an SA6404 controller.
Item ID Description
0–7 Runtime LEDs (CR10–CR17). These are identical to the
controller board runtime LEDs (on page
30 ).
8 VHDCI connector, port B2
9 VHDCI connector, port B1
10 Connector to controller board
The expansion module is a controller in its own right. Thus, the SA6404 controller is actually two 2-
channel controllers sharing one PCI-X connector. This arrangement is referred to as a dual (or twin)
controller configuration.
During POST, each component controller loads its own instance of the required driver and sets its own
configuration using ORCA. The dual controller is displayed in both Systems Insight Manager and ACU as
two separate entities in one slot. In these utilities, the slot number label for the expansion module has a
lowercase b suffix, while the slot number label for the main controller has no suffix.
NOTE: When an expansion module is installed, the capacity of the battery-backed write cache on the main
board is divided equally between the expansion board and the main board. For more information, refer to
customer note CN0316W on the HP website (
http://www.hp.com ).
Controller specifications and attributes
Dimensions (excluding bracket) 31.2 cm x 10.7 cm x 1.8 cm (12.3 in x 4.2 in x 0.7 in)
Power required Typically 12–18 W
Ambient room temperature range Operating: 10° to 35°C (50° to 95°F)
Storage: -20° to 55°C (-4° to 131°F)
Relative humidity (noncondensing) Operating: 10% to 70%
Storage: 5% to 90%