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

12 en | Introduction RAID Subsystem DVA-16K | Installation Manual

F.01U.027.799 | V2 | 2008.08 Bosch Security System

2.4.4 Hard Drive Numbering

The front panel of the RAID subsystem enclosure houses sixteen (16) hard drives in a 4x4 con-

figuration as shown in Figure 2.5. When viewed from the front, the drive bays (slots) are num-

bered 1 to 16 from left to right, from top to bottom.

Fig. 2.5 Hard Drive Numbering

2.4.5 Rear Panel Overview

The rear section of RAID subsystem is accessed through the rear panel and is reserved for a

single RAID controller module, one (1) BBU, two (2) power supply units (PSUs) and two (2)

cooling modules.

The rear panel of the RAID subsystem described in this manual is shown in Figure 2.6. A

description of each rear panel component is given below:

Fig. 2.6 RAID subsystem Rear View

The rear panel shown in Figure 2.6 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 2.5.3 The

RAID Controller Module)

• BBU: A BBU sustains cache memory during a power shortage to prevent data loss. (See

Section 2.5.6 Battery Backup Unit (BBU))

• PSUs: 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 2.5.7 Power

Supply Units)

• Cooling modules: The redundant cooling modules ventilate the subsystem to reduce the

temperature within the subsystem. (See Section 2.5.8 Cooling Modules)

• Dummy plate: This device is a single controller subsystem. The only controller module is

installed in the upper controller bay. A dummy plate covers the lower controller bay at

the rear of the subsystem.

2.4.6 Backplane Board

Internal backplane boards separate the front and rear sections of the RAID subsystem. The

PCB board provide logic level signals and low voltage power paths. They contain no user-ser-

viceable components.

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Bosch DVA-12T Installation Manual Page 12