Galaxy GHDX4 RAID iSCSI-SAS/SATA InstaHardware Reference Manual
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Figure 1-2: 16 bay (top) and (bottom) Rear View
24 bay Rear View
The enclosure rear section accommodates the following components:
•
RAID controller module(s):
The RAID controller module
manages all functionalities provided with the subsystem, and
all interface connectors are provided on the controller
faceplates.
•
BBU module (within the controller canister):
BBU
modules come as standard equipment for the redundant-
controller model, and as an optional module for the single-
controller. The BBU sustains unfinished writes cached in
memory during a power outage in order to prevent data loss.
•
PSU modules:
The hot-swappable PSUs receive single-
phase power and d5V, +12V, and +3.3V power to the
subsystem. A power switch is located on each PSU to turn
the system on and off.
•
Cooling modules:
The redundant cooling modules ventilate
the subsystem to maintain a cooling airflow across the
subsystem.
Backplane Board
An internal backplane board separates the front and rear sections of
the enclosure. The backplane consists of traces for logic level signals
and low voltage power paths. It contains no user-serviceable
components.
WARNING!
