User guide

Galaxy 55 User Guide
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• An Enclosure System Interface/Operators Panel (ESI/Ops) plug-in module (see Figure 1–5).
• Blank plates, as required to complete your required configuration and installation.
• FC-AL Drive Carrier Modules and associated front dummy fascia plates. (See Figure 1–13).
• FC-AL Input/Output Modules. (See Figure 1–9).
• A third Power Supply/Cooling Module may be required to support some 10 000 rpm disk drives.
1.2.1 Enclosure Chassis
The chassis consists of two segmented chassis assemblies, constructed from a number of aluminum extruded
sections, with a Backplane PCB between them. The chassis assemblies each contain 12 'Bays', each of which
accommodates a plug-in module (larger modules can be accommodated using multiple bay spaces). The Backplane
PCB provides logic level signal and low voltage power distribution paths. A Galaxy 55 chassis is shown in Figure
1–2 and Figure 1–3.
• A Bay is defined as the space required to house a single 1.6" high 3.5 inch disk drive in its carrier module. e.g.
a 1 x 3 bay module would take the space of 1 drive width by 3 drive bays high (in rack mount configuration).
• A 4 x 3 Chassis fitted with 19 inch Rack mounting features enables it to be fitted to standard 19 inch racks. It
uses 4EIA units of rack space.
Figure 1–2 Enclosure Chassis (Front)
Figure 1–3 Enclosure Chassis (Rear)