Appendix A

Rack Enclosure Requirements

The server is designed so that you can install it into a 72-inch (184-cm) tall Sun expansion cabinet or other EIA-compliant industry-standard rack enclosure that meets the requirements listed in the table below. You need a Sun rackmounting kit for each server that you will rackmount.

Rack Enclosure Feature
Requirement

Load Bearing Capacity

The rack must firmly support the weight of as many Sun Fire 280R servers as you are installing into the rack (each weighs up to 75 lb, 34 kg), plus the weight of the rackmounting hardware, and the weight of any other installed devices.

Vertical Space Requirements

Each server requires four rack units (7 inches, 17.78 cm) of vertical space for rack installation. A 72-inch (184-cm) cabinet can hold up to nine servers.

Airflow

The system requires 113 cfm at 40^o C and 10,000 feet. This airflow rate corresponds to 328 lb/hr at any altitude and to 78 cfm at 40^oC and sea level.

For proper ventilation, each system in the rack enclosure requires 28 square inches (181 square cm) of unrestricted airflow into the front of the system, and 23 square inches (148 square cm) of unrestricted exhaust port at the back of the system. Maintain a minimum 1.5 inches (3.8 cm) clearance between the system and any front or back doors.

Vertical Mounting Rail Requirements

The rack must have two pairs of vertical mounting rails (one pair in front, one pair in back) that conform to the EIA (RETMA) standard for mounting hole spacing.

Left-side-to-right-side rail spacing (mounting hole center to mounting hole center) for front and back rails must be 18.3 inches (46.5 cm).

Front-to-back rail spacing must be at least 26.875 inches (68.26 cm) and not more than 34.875 inches (88.5 cm) from the outside face of the front rail to the outside face of the back rail.

Front and back vertical rail mounting faces must be parallel with each other and with the front plane of the rack.

Doors and Panels

If you are using a Sun expansion cabinet, you can remove the front door and the side panels to increase access to the system. Otherwise, see the instructions provided with the rack enclosure.

EMI Requirements

Electromagnetic interference (EMI) shielding requirements are met by the system chassis and metal side panels, which remain in place when the unit is rackmounted.

Anti-Tilt Protection

The rack must be bolted securely to the floor or equipped with two sturdy and extendable anti-tip legs. You must prevent the cabinet from tilting forward when one or more systems or devices are fully extended out the front of the rack.

Minimum Service Access

An area not less than 3 feet (1 meter) deep and 6 feet (2 meters) wide must be available in front of the rack for installation and service access.

When fully extended on its mounting rail slides, the system will protrude 29.75 inches (75.6 cm) forward of the rack's front vertical mounting rails.

Fire Containment

The rack enclosure must meet Underwriters Laboratories, Inc. and TUV Rheinland of N.A. requirements for fire containment.

Rack Enclosure Feature	Requirement
Load Bearing Capacity	The rack must firmly support the weight of as many Sun Fire 280R servers as you are installing into the rack (each weighs up to 75 lb, 34 kg), plus the weight of the rackmounting hardware, and the weight of any other installed devices.
Vertical Space Requirements	Each server requires four rack units (7 inches, 17.78 cm) of vertical space for rack installation. A 72-inch (184-cm) cabinet can hold up to nine servers.
Airflow	The system requires 113 cfm at 40^o C and 10,000 feet. This airflow rate corresponds to 328 lb/hr at any altitude and to 78 cfm at 40^oC and sea level. For proper ventilation, each system in the rack enclosure requires 28 square inches (181 square cm) of unrestricted airflow into the front of the system, and 23 square inches (148 square cm) of unrestricted exhaust port at the back of the system. Maintain a minimum 1.5 inches (3.8 cm) clearance between the system and any front or back doors.
Vertical Mounting Rail Requirements	The rack must have two pairs of vertical mounting rails (one pair in front, one pair in back) that conform to the EIA (RETMA) standard for mounting hole spacing. Left-side-to-right-side rail spacing (mounting hole center to mounting hole center) for front and back rails must be 18.3 inches (46.5 cm). Front-to-back rail spacing must be at least 26.875 inches (68.26 cm) and not more than 34.875 inches (88.5 cm) from the outside face of the front rail to the outside face of the back rail. Front and back vertical rail mounting faces must be parallel with each other and with the front plane of the rack.
Doors and Panels	If you are using a Sun expansion cabinet, you can remove the front door and the side panels to increase access to the system. Otherwise, see the instructions provided with the rack enclosure.
EMI Requirements	Electromagnetic interference (EMI) shielding requirements are met by the system chassis and metal side panels, which remain in place when the unit is rackmounted.
Anti-Tilt Protection	The rack must be bolted securely to the floor or equipped with two sturdy and extendable anti-tip legs. You must prevent the cabinet from tilting forward when one or more systems or devices are fully extended out the front of the rack.
Minimum Service Access	An area not less than 3 feet (1 meter) deep and 6 feet (2 meters) wide must be available in front of the rack for installation and service access. When fully extended on its mounting rail slides, the system will protrude 29.75 inches (75.6 cm) forward of the rack's front vertical mounting rails.
Fire Containment	The rack enclosure must meet Underwriters Laboratories, Inc. and TUV Rheinland of N.A. requirements for fire containment.

Appendix A Rack Enclosure Requirements

Appendix A

Rack Enclosure Requirements