1-26 SPARC Enterprise M8000/M9000 Servers Overview Guide • April 2007
1.5.2 External I/O Expansion Unit
The External I/O Expansion Unit is an optional product used to add PCI slots. The
External I/O Expansion Unit has a height of four RUs (rack units), about 18 cm, in a
19-inch rack.
The External I/O Expansion Unit can accommodate up to two I/O Boats by using
either six PCIe slots or six PCI-X slots.
■ PCIe slots in each I/O Boat: short size to long size (to 312 mm)
■ PCI-X slots in each I/O Boat: short size to long size (to 312 mm)
Also, active addition and replacement is enabled for all slots in the External I/O
Expansion Unit.
For details, see the I/OExpansion Box Installation and Service Manual .
FIGURE 1-11 shows the External I/O Expansion Unit.
FIGURE 1-11 External I/O Expansion Unit
1.5.3 SPARC Enterprise M9000 Server (Expansion
Cabinet) Option
A SPARC Enterprise M9000 Server (base cabinet) configuration can contain up to 32
CPU Modules (64 cores), up to 2TB of memory, and up to 224 PCI slots. A
configuration containing more components than described above would require the
expansion cabinet option of the SPARC Enterprise M9000 Server.
A configuration with the SPARC Enterprise M9000 Server (expansion cabinet) can
contain up to 64 CPU modules (128 cores), up to 4TB of memory, and up to 288 PCI
slots.
