Bosch Appliances DVA-12T installation manual Subsystem Components, Backplane Board, Front Handles

10 en Introduction RAID Subsystem DVA-12T Installation Manual

The rear panel shown in Figure 2.5 accommodates the following components:

•RAID controller module: A controller board and a DDR RAM DIMM module are housed in the controller module to provide the system RAID functionalities. (See Section 2.3.3 The RAID Controller Module)

•BBU module: An BBU module sustains cache memory during a power shortage to prevent data loss. (See Section 2.3.6 BBU)

•PSU modules: The hot-swappablePSUs provide power to the subsystem. A power switch is located on the right of each PSU to turn the system on and off. (See

Section 2.3.7 Power Supply Units)

•Cooling modules: The redundant cooling modules ventilate the subsystem to reduce the temperature within the subsystem. (See Section 2.3.8 Cooling Modules)

2.2.5	Backplane Board
	An internal backplane board separates the front and rear sections of the RAID subsystem. The
	PCB board consists of traces for logic level signals and low voltage power paths. It contains
	no user-serviceable components.
	CAUTION!
	When inserting a removable module, DO NOT USE EXCESSIVE FORCE! Forcing or slamming a
	module can damage the pins on the module connectors either on the module itself or on the
	backplane. Gently push the module until it reaches the end of module slot. Feel the contact
	resistance and use slightly more pressure to ensure the module connectors are correctly
	mated. If the module comes with reject levers or retention screws, use them to secure the
	module.

2.3	Subsystem Components
	The RAID subsystem houses many active components and most of them can be accessed
	through either the front or rear panel. The modular design of the active components facilitates
	their easy installation and removal. Hot-swap mechanisms are incorporated to eliminate
	power surges and signal glitches that might occur while removing or installing these modules.
2.3.1	Front Handles

Fig. 2.6 Handles

A left and a right handle are installed on the front side of the chassis. Each handle has a release latch to secure the position of the handle when closed. (See Figure 2.6) To access drive bays in the left or right column behind the handles, first flip the release latch on the enclosure front handles, and then swing the handles to the left and right sides, respectively. (See Figure 2.7) To close the handles, swing the handles toward the system; gently press the handles until a click is heard. The latches will keep the handles in place.

F.01U.027.798 V1 2006.06 Bosch Security Systems