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Rackmounting and Improving Serviceability

The 1280 server can be mounted in a Sun Rack 900 hardware rack, the Sun StorEdge™ array rack, or the Sun Fire rack. The Sun Rack 900 hardware rack is recommended over the other racks for the following reasons:

  • At 900 millimeters deep, it contains plenty of space for the 1280 server, cable management arm, cables, and free air flow.

  • The extending leg supports the 1280 server when it is extended on its sliders.

  • Power sequencing within the rack avoids multiple in-rush when the power is applied.

While it is possible to use the Sun StorEdge rack or the Sun Fire rack, these are not ideal because they are deeper and contain functions such as a redundant transfer switch (RTS), fans, and FrameManager that are costly and not required by the 1280 server. Also, the redundant transfer unit (RTU) outputs in the Sun Fire rack are not adequate for the 1280 server because the circuit breaker is too fast. The in-rush to the V1280 would be likely to trip this breaker. This does not depend on how many servers are mounted in the rack or on the configuration of the servers. Hence, the servers in a Sun Fire rack need their own external power receptacles and circuit breakers. The RTU can still be used for other components mounted in the rack.

Currently, because of weight and power limitations, a maximum of two servers can be installed in the racks. Two servers can be installed in a four-post rack. The first server should be no lower than 10 inches above the floor. The second server can be mounted directly above the first server, but the top of the system should not exceed 52 inches above the floor.

Only one server should be fitted to a two-post rack in the lower position. The design of the 1280 server allows it to be mounted in either a 19-inch or 24-inch standard Telco rack. Within a standard 72-inch rack, the 1280 servers can be mounted two in a rack, occupying the lowest positions in the rack—no higher than 52 inches for the top server. The Netra 1280 server cannot use the internal rack AC power distribution systems. They require AC power distribution from the customer's premises.

Proper site preparation requires either anchoring the rack to the floor or using rack extenders to stabilize the rack for server installation and maintenance. Before installing or servicing the server, you should position the extender forward to prevent the entire rack from tilting forward as the center of gravity changes. Where two servers are installed in a rack, only one of them should be withdrawn for service at any time. The slides can be extended forward from the rack, and the processor boards, PCI cards, or other boards can be added, changed, or removed. It is strongly recommended that a lift be used when installing or removing the server from the rack.

The cable management arm should be installed and the cables routed through it. No units or cables above or below a 1280 server should protrude beyond the front of the rack. This allows service access when the slides are fully extended. Servicing components in the 1280 server requires that the chassis be extended forward out of the cabinet. The cable management arm is designed to enable this movement, while maintaining cable connection integrity.

Both the AC and DC servers ship with filter cartridges on the rear of the front door of the system. These filters reduce the intake of dust particles, so they should not be removed. The cartridges require periodic cleaning or replacement.

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