This chapter describes the physical characteristics of the short and tall racks in the following sections:
Two rack sizes are used in the SGI Altix 3000 series systems. The short (17U) rack shown in Figure 4-1 is used in the Altix 3300 system model, and the tall (40U) rack shown in Figure 4-2 is used in the Altix 3700 system model.
The short rack (shown in Figure 4-1) has the following features and components:
Front door and rear door. Both doors have key locks that prevent unauthorized access to the system.
Cable entry/exit area located in the rear floor of the rack. Cables are attached at the rear of the rack. The rack is mounted on four casters; the two rear casters swivel. The base of the rack has leveling pads, a ground strap, and seismic tie-downs.
Power distribution strip (PDS). The PDS has ten 220 VAC connectors to connect to the power bay and a circuit breaker switch.
Single power bay. This bay provides 48-VDC power for the C-bricks and the IX-brick.
The tall rack (shown in Figure 4-2) has the following features and components:
Front and rear door. Both front and rear doors lock to prevent unauthorized access to the system. You lock the front door from the rear of the rack by depressing and turning the actuator handle (see “Locking the Front Door”). Once the front door is locked, you lock the rear door with a key.
L1 controller display. Rack number 001 of each system has a display mounted on the inside of the rear door.
Cable entry/exit area located in the rear floor of the rack. All cables are attached to the rear of the bricks. The rack is mounted on four casters; the two rear casters swivel. The base of the rack has leveling pads, a ground strap, and seismic tie-downs.
The tall rack also has cable entry/exit areas at the top, bottom, and sides of the rack. I/O and power cables pass through the bottom of the rack. NUMAlink cables pass through the top and sides of the rack. Cable management occurs in the rear of the rack.L2 controller. This controller monitors and generates status and error messages for rack items such as the power bay.
One or two power bays, depending on your computing needs. Each power bay can have three, four, or five power supplies.
One or two power distribution units (PDUs) per rack, depending on the number of power bays. A PDU can be a single-phase power or three-phase power distribution unit.
To lock the front door of the tall rack, follow these steps:
Close the front door.
In the rear of the rack, press in the door lock actuator and rotate the lever to point downward (see Figure 4-3).
Table 4-1 lists the technical specifications of the short rack.
Table 4-1. Short Rack Technical Specifications
Characteristic | Specification |
|---|---|
Height | 36.06 (916 mm) |
Width | 25.41 in. (645 mm) |
Depth | 41.83 in. (1062 mm) |
Weight | 200 lb (90.72 kg) |
Table 4-2 lists the technical specifications of the tall rack.
Table 4-2. Tall Rack Technical Specifications
Characteristic | Specification |
|---|---|
Height | 74.25 in. (1885.95 mm) |
Width | 30.875 in. (784.23 mm) |
Depth | 53 in. (1346.2 mm) |
Weight | 425 lb (192.78 kg) |