Bosch DVA-12T Installation Manual download pdf (Page 10)

10 en | Introduction RAID Subsystem DVA-12T | Installation Manual

F.01U.027.798 | V1 | 2006.06 Bosch Security Systems

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-swappable PSUs 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.

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.

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.

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Bosch DVA-12T Installation Manual Page 10