Sun Microsystems 280R manual About System Rackmounting, Rackmounting Guidelines

About System Rackmounting

You can mount the server in any rack that meets the Electronic Industries Association (EIA) standard specification 310 (EIA 310). The system enclosure measures 6.95 inches high, 17.25 inches wide, and 27.25 inches deep (17.6 cm x

43.8cm x 69.2 cm) and requires a minimum of four vertical rack units (RUs—1 RU is

1.75inches or 4.45 cm). The system has a maximum weight of 75 lb (34 kg).

Shipped with your system is the Sun Fire 280R Server Setup and Rackmounting Guide, which describes how to rackmount your server. Use the guide for rackmounting instructions.

Rackmounting Guidelines

■Install the slide assemblies for the first server in the lowest possible rack position.

■For stability, install the remaining servers from the lowest system upward into the rack, as shown in the next figure.

■To mount the server in an EIA standard rack, allow four RUs per system to obtain the highest density in the rack. Use the supplied Rack Buddy rackmounting template to locate the correct holes for server placement in the rack.

Use the Rack Buddy to determine at what height in the rack you will install the server slide assemblies (and other subsequent server slide assemblies).

For example, a Sun cabinet might have 36 configurable vertical RUs and could support up to nine servers. To maximize server density in a 72-inch (182.8-cm) rack, install the slide assembly brackets starting for the lowest enclosure at rail hole 9 (in a rack configured with a power sequencer in holes 1 to 6), and add subsequent brackets starting at rail holes 21, 33, 45, 57, 69, 81, 93, and 105. The following figure illustrates such a configuration.

Chapter 2 System Setup 21