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18 Sun Enterprise 220R Server Owner’s Guide • October 1999
About Server Rackmounting
The server may be mounted in any rack that meets the Electronic Industries
Association (EIA) standard specification-310 (EIA 310). The system enclosure
measures 7.00 inches high, 17.25 inches wide, and 27.25 inches deep (17.8 cm x 43.8
cm x 69.2 cm) and requires a minimum of four vertical rack units (RUs). The system
has a maximum weight of 65 lb (34 kg).
Shipped with your system is the Sun Enterprise 220R Server Setup and Rackmounting
Guide that describes the procedure for rackmounting the server. Use the guide to
rackmount your server.
Rackmounting guidelines:
■ Install the slide assemblies for the first server in the lowest permissible 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.
Note – For the latest configuration information about mixing different systems or
peripherals in standard EIA 310-compliant racks, and for information about Sun’s
rackmounting cabinets consult the Rackmount Placement Matrix located at the URL
http://docs.sun.com. At the site, click on Storage and Peripherals, find
Rackmount Placement Matrix among the AnswerBook2 collection titles, and click on
the link to display the book.
You need to use the Rack Buddy to help decide at what height in the rack rail you
will install the server slide assemblies (and other subsequent server slide
assemblies). For example, an empty Sun cabinet might have 36 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
3 (in an empty rack), and add subsequent brackets at rail holes 15, 27, 39, 51, 63, 75,
87, and 99.