APC RAID Subsystem SCSI-SATA II Specifications Page 15

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Falcon II SCSI-SATA Installation and Hardware Reference Manual
Figure 1-4: Hard Drive Numbering
1.1.2.5 Rear Panel Overview
The rear section of FALCON II subsystem is accessed through the rear
panel and is reserved for a single RAID controller module, one (1) optional
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 1-5. A description of each rear panel component is given below:
Figure 1-5: FALCON II Rear View
The rear panel shown in Figure 1-5 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 1.2.4)
BBU: An optional BBU sustains cache memory during a power
shortage to prevent data loss. (See Section 1.2.7)
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 1.2.8)
Cooling modules: The redundant cooling modules ventilate the
subsystem to reduce the temperature within the subsystem. (See
Section 1.2.9)
Dummy plate: The FALCON II is a single controller subsystem.
The only controller module is installed in the upper controller bay.
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