Specifications

SGI Origin 3900 Server Bricks

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SGI Origin 3900 Server Bricks

The SGI Origin 3900 servers are based on assemblages of CPU/memory, I/O, and

peripheral enclosures referred to as bricks. These bricks may be mixed and matched

within a standard 19-in. system rack to provide the desired system conﬁguration.

NUMAlink cables connect the bricks.

Customers may install bricks in any existing standard 19-in. rack if the system contains

eight CPUs or fewer and the rack meets size, cabling, and airﬂow requirements of the

individual racks. Systems with larger conﬁgurations (more than eight CPUs) require an

Origin 3000 series rack; the Origin 3000 series rack includes special cable management

and power distribution infrastructure.

The SGI Origin 3900 rack has 39U (usable spaces) of conﬁgured height; 1U equals 1.75

inches (44.5 mm).

Table 3-1 lists the Origin 3900 server brick types, functions, and vertical rack heights.

Figure 3-1 shows the various Origin 3900 server brick types installed in the rack.

Table 3-1 Origin 3900 System Brick Types, Functions, and Heights

Brick Type Components Height

Cx-brick Provides the compute functionality for the system in 2 to 8

processors per Cx-brick

P-brick Seats the PCI cards that communicate with peripheral devices. 4U

I-brick Provides the I/O functions for basic Origin 3900 servers and boot

I/O functions for large Origin 3900 servers.

R-brick Routes information between Cx-bricks 2U

X-brick Provides XIO slots that are compatible with XIO slots in SGI Origin

2000 series servers and Silicon Graphics Octane workstations

D-brick Houses a maximum of 12 disk drives − either JBOD or RAID 4U

Power bay Provides power control and monitoring for the Cx-, P-, I-, R-, and

X-bricks