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Chapter 1. Introducing the RS/6000 Enterprise Server Model H80
The Model H80 and 660 Models 6H0 and 6H1 is a multiprocessor, multibus system
packaged in drawers. The processors and memory are packaged in a 5 EIA-unit central
electronics complex (CEC drawer), and the I/O devices are in a 5 EIA-unit I/O drawer.
The basic system consists of one CEC drawer and one I/O drawer in the same rack.
Connections between the CEC drawer and I/O drawers are made through a number of
cables, which include the V/S COMM cable, RIO (remote input/output) cables, and
JTAG cable.
The CEC drawer supports one processor card, which, depending on the system model,
can support up to six processors, each having its own L2 cache. The processors share
common system memory.
The system memory resides on one or two memory riser cards in the CEC drawer. Up
to 32 GB of system memory can be installed.
Power is provided to the system rack through an ac power cord that is connected to a
distribution bus. Power is connected from the distribution bus to each drawer
independently. All drawers use 200 - 240 V ac power or -48 V dc power.
The primary I/O drawer has the following:
v 14 PCI slots
v System operator panel
v SPCN controller
v Interrupt and system bus control logic
v Service processor
v Optional boot DASDs
v Various connectors, including four serial port connectors, on the back of the drawer
for the attachment of external devices.
Note: Serial ports 1 and 2 can only be used to access the service processor menus.
The PCI bus speeds are as follows:
v Up to 33Mhz for the four 32 bit slots at 5 V
v Up to 66Mhz for the ten 64 bit slots at 3.3 V
Slots 1-5, 8-10, 13 and 14 support either 32 or 64 bit PCI adapters. The remaining slots
are 32 bit only.
The primary I/O drawer has space for up to three media devices (tape, CD-ROM, and
diskette drive). Two optional disk drives can occupy PCI slots 13 and 14.
No "heartbeat"-type devices or cables can be used on these ports.
"Heartbeat"-type devices or cables must be installed on serial port 3 or serial
port 4.
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