External I/O Expansion Unit Configurations; Single Boat Configuration; Dual Boat Configuration - Sun Microsystems SPARC Enterprise T5120 Installation And Service Manual

1.4 External I/O Expansion Unit
Configurations
The External I/O Expansion Unit is available with one or two I/O boats.
1.4.1

Single Boat Configuration

The base configuration for an External I/O Expansion Unit has a single boat, with a
filler panel in the second boat bay.
A link card in the host server connects to a link card in the External I/O Expansion
Unit. A link cable connects the two link cards.
The link kit includes a 13 ft/4 m cable.
1.4.2

Dual Boat Configuration

The dual boat configuration provides twelve I/O slots. Each of the I/O boats requires
its own link kit, so the host server must have two I/O slots available for this purpose.
Note – The maximum number of I/O boats that can be attached to a server can vary
according to the server model. See
Note – If you are installing a second boat in the External I/O Expansion Unit, both
boats must be connected to the same host server. Do not connect the second boat to a
different server. The second boat can be connected to a different domain on the same
server, but not to a domain on a different server.
Note – Do not daisy-chain two boats (connect a boat to another boat through link
cards). Daisy-chain configurations are not allowed.
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TABLE 1-1
Chapter 1 Overview 1-33