Silicon Graphics UV 2000, Руководство пользователя системы

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4: Rack Information
SGI UV 2000 Series Rack (42U)
The tall rack (shown in Figure 4-1 on page 53) has the following features and components:
• Front and rear door. The front door is opened by grasping the outer end of the
rectangular-shaped door piece and pulling outward. It uses a key lock for security purposes
that should open all the front doors in a multi-rack system (see Figure 4-2 on page 54).
Note: The front door and rear door locks are keyed differently. The optional water-chilled
rear door (see Figure 4-3 on page 55) does not use a lock.
The standard rear door has a push-button key lock to prevent unauthorized access to the
system. The rear doors have a master key that locks and unlocks all rear doors in a system
made up of multiple racks. You cannot use the rear door key to secure the front door lock.
• Cable entry/exit area. Cable access openings are located in the front floor and top of the
rack. Multiple cables are attached to the front of the IRUs; therefore, a significant part of the
cable management occurs in the front part of the rack. The stand-alone system management
nodes have cables that attach at the rear of the rack. Rear cable connections will also be
required for optional storage modules installed in the same rack with the IRU(s). Optional
inter-rack communication cables can pass through the top of the rack. These are necessary
whenever the system consists of multiple racks. I/O and power cables normally pass through
the bottom of the rack.
• Rack structural features. The rack is mounted on four casters; the two rear casters swivel.
There are four leveling pads available at the base of the rack. The base of the rack also has
attachment points to support an optional ground strap, and/or seismic tie-downs.
• Power distribution units in the rack. Up to 12 outlets are required for a single-rack IRU
system as follows:
– Allow three outlets for the first IRU
– Two outlets for a maintenance node SMN (server)
– Two outlets for each storage or PCIe expansion chassis
– Allow three more outlets for each additional IRU in the system
Note than an eight outlet single-phase PDU may be used for the system management node
and other optional equipment.