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10
en | Introduction
2.2.4
Hard Drive Numbering
The subsystem is housed in an enclosure that is 4 bays wide and 2 bays high. When viewed
from the front, drive bays (slots) are numbered 1 to 8, from the left to the right, and then from
the top to the bottom.
Fig. 2.4 Drive Bays Numbering Sequence
2.2.5
Rear Panel Overview
The rear section of the subsystems are accessed through the rear panel and is reserved for a
single RAID controller module, one (1) battery backup unit (BBU), two (2) power supply units
(PSUs), and two cooling fan modules.
The subsystem rear view is shown in Figure 2.5. A description of the rear panel component is
given in the proceeding discussions:
Fig. 2.5 Rear View
The rear panel shown above is designed to accommodate the following components:
•
•
•
•
NOTICE!
Each of the power supplies on the sides of the enclosure houses one cooling fan module in a
i
removeable canister. When a power supply is removed, the cooling module is also removed.
Therefore, replace the power supply unit as soon as possible whenever it becomes necessary.
Cooling fan modules can be independently removed from the chassis without affecting PSU
operation.
2.2.6
Backplane Board
An integrated backplane board separates the front and rear sections of the subsystem. The
PCB board provides traces for logic level signal traces and low voltage power paths. It con-
tains no user-serviceable components.
F.01U.027.797 | V1 | 2006.05
RAID controller module: The controller module contains a controller main board and a
pre-installed DDR DIMM module.
Power Supply Unit (PSU): The PSU is used to provide power to the subsystem.
BBU module: A BBU provides the protective implementation to cached data; and, unless
deselected when purchasing the subsystems, is installed into the module slot located at
the upper left corner of the controller module.
Cooling fan module: The redundant cooling fan module is used to ventilate the subsystem
and to reduce the temperature within the subsystem.
RAID Subsystem DVA-08K | Installation Manual
Bosch Security Systems
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