This chapter describes the physical characteristics of the tall (40U and 42U) Prism XL system racks in the following sections:
At the time this document was published only the tall (42U) rack (shown in Figure 4-1) was approved for standard use with Prism XL systems. Additional customized racks may be available, check with your SGI sales or service representative.
At time of publication all Prism XL system racks were tall racks offering the following features and components:
Front and rear door. The front door uses a key lock for security purposes that should open all the front doors in a multi-rack system. Note that the front door and rear door locks are keyed differently. Racks equipped with an optional water-chilled rear door do not use a rear-door lock.
The 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. System cable management occurs in the front, rear and top of the rack. I/O and power cables normally pass through the bottom of the rack. Note that single-rack systems do not generally require top access cable management. Rear cable connections will also be required for optional storage modules installed in the same rack with the Prism XL sticks. Optional inter-rack communication cables pass through the top of the racks.
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. The number of outlets required in each rack will vary, a minimum of one 8-outlet PDU is required for a single-rack system:
2 outlets for two sticks
2 outlets for the head node server (head nodes with single-power supply configurations may be available - check with your SGI sales or service representative)
4 outlets for two switches
Note: Each stick uses one power supply to provide voltage to both internal nodes (slices).
The 42U tall rack accommodates the maximum number of sticks and allows a 2U space to accommodate a head node or other optional equipment within a single rack.
Table 4-1 provides the basic specifications for the 42U Prism XL system rack.
Table 4-1. 42U Rack Technical Specifications
Characteristic | Specification |
|---|---|
Height | 78.74 in. (200 cm) |
Width | 24 in. (61 cm) |
Depth | 40 in. (101.6 cm) Depth expands with optional water cooling |
Weight (full) | ~1700 lbs (772.7 kg) approximate |
