Chapter 1 System Overview 1-27
FIGURE 1-19 I/O Unit Locations in the SPARC Enterprise M5000 Server
.
The I/O unit (IOU) is used in both the midrange servers. Refer to the SPARC
Enterprise M4000/M5000 Servers Service Manual for more information on the IOU.
The IOU houses the following:
■ Four PCIe 8lane, x8 short card slots (four upper slots)
■ One PCI-X short card slot (lowest slot)
The IOU holds cassettes that support four PCIe cards and one PCI-X card.
The PCIe features include a high-speed serial point-to-point interconnect. Compared
with conventional PCI buses, the PCIe data transfer rates are doubled. PCI-X is the
current PCI standard.
Location Number Component Maximum Number per Server
1 I/O unit 2
1
1
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