HP RX8620-32 - Manual (Page 19)

Core I/O
The HP Integrity rx7620-16 and rx8620-32 Servers are purchased with either one or two core I/O
card products. In both systems, core I/O provides console, Ultra160 SCSI, Gigabit LAN, serial, and
Management Processor (MP) functionality, along with SCSI controllers for the peripheral bay. The
second core I/O product can be used to enable dual partitioning, provide access to a second set of
disk drives, and provide redundant MP functionality. In the HP Integrity rx8620-32 Server, the second
core I/O product also enables the use of an additional removable-media device. Although core I/O
provides the same functionality in both the HP Integrity rx7620-16 and rx8620-32 Servers, the
physical implementation is different. To accommodate size limitations, the core I/O in the Integrity
rx7620-16 Server is divided across two separate boards, while the core I/O in the Integrity
rx8620-32 Server is implemented on one physical board. The following sections detail the core I/O
implementation in each system.
HP Integrity rx7620-16 Server core I/O
The Integrity rx7620-16 Server chassis supports up to two core I/O card sets. Each set contains two
cards (MP/SCSI and LAN/SCSI), which are installed in different locations: MP/SCSI cards are
installed along the right rear vertical edge of the chassis; LAN/SCSI cards are installed in the PCI-X
card bay. A minimum of one core I/O card set must be ordered with each system; the optional
second core I/O card set can be used to enable hardware partitioning or to utilize the full capacity of
the built-in mass storage bays.
Both core I/O card sets are identical. However, the electrical connections to internal peripherals and
the I/O controller are slightly different. In the primary core I/O set, the LAN/SCSI board is supported
by a single 530 MB/s link; in the secondary core I/O set, the LAN/SCSI board is supported by two
530 MB/s links. In addition, in the primary core I/O set, the two SCSI controllers—one in the
LAN/SCSI card and one in the MP/SCSI card—each support a single internal disk drive. In the
secondary core I/O, only the MP/SCSI board is used to support disk drives. However, both disk
drives are supported from this single SCSI controller and bus.
Figure 14. Block diagram showing basic core I/O card set (primary) in the Integrity rx7620-16 Server
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