User Service Guide, Fifth Edition - HP Integrity rx8640 SEU

1 Server Expansion Unit Overview

The Server Expansion Unit (SEU) is a member of the HP business-critical computing platform

family: a 9U tall, mid-range, mid-volume I/O expansion cabinet. It provides additional I/O

performance with the inclusion of 16 PCI-X slots or a combination of 8 PCI-X slots and 8 PCI-e

slots, two additional core I/O cards, four more hard disk drives, and two removable media drives.

The SEU connects to the HP Integrity rx8640 server, providing additional I/O slots to the server.

There are no cell boards installed in the SEU. Its high-availability features include N+1 hot-plug

fans and power, redundant power cords, hot-plug PCI cards and internal hard disk drives.

Differences from the previous SEU include the following:

• New PCI-X I/O Backplane

• New PCI-X/PCIe I/O Backplane

• New core I/O and core I/O backplane board

• New mass storage backplane

• New front panel display

• New system backplane

• New I/O cable assembly

• New backplane connectors

Figure 1-1 SEU (Front View)