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v Your server scans devices and PCI-X slots to assign system resources in the
following order: DVD-ROM drive; disk drives; integrated SCSI devices; PCI-X
slots 1, 2, 3, 4, 5, 6; and the integrated Ethernet controller. If an RXE-100
enclosure is attached to the server, the scan continues in sequence with PCI
slots 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, and 18.
v You can use the Configuration/Setup Utility program to change the sequence and
have the server scan one of the first six PCI slots before it scans the integrated
devices. You cannot change the scan sequence of the PCI slots in an RXE-100
enclosure.
v You can install both PCI and PCI-X adapters in the same bus. However, if you
install a PCI adapter and a PCI-X adapter in the same bus, the PCI-X features of
the PCI-X adapter will be disabled, and the adapter will function as a PCI
adapter.
v You can install PCI or PCI-X adapters of speeds faster than what is labeled for a
particular PCI-X bus. For example, if you install two 133 MHz adapters into slots
that are labeled as 100 MHz slots, the adapters will operate at 100 MHz.
v If you install a 33 MHz and a 66 MHz adapter in the same bus, the bus speed
will match that of the slowest adapter.
v If a single 133 MHz adapter is installed in PCI-X bus B (slot 3 or 4) and the other
slot in PCI-X bus B is empty, the adapter will operate at 133 MHz.
v Your server supports 3.3 V adapters; it does not support 5.0 V adapters.
v Do not install a PCI-X adapter in PCI-X slot 1 if you are going to install the serial
port that comes with your server. See "Installing the serial port" on page 31 for
instruction for installing the serial port.
Note: Before hot-swapping any of the PCI-X adapters, read the information in
"Working inside the server with the power on" on page 8.
Complete the following steps to install an adapter:
1. Read the safety information beginning on page v and "Installation guidelines" on
page 7.
2. Open the top cover.
Note: There are six PCI-X slots inside your server: two 66 MHz, two 100 MHz,
and two 133 MHz. Before attempting to install a new adapter, be sure
that there is an available slot for it. If you need additional PCI-X slots,
you can purchase an RXE-100 enclosure through your IBM marketing
representative or authorized reseller.
Chapter 2. Installing options
27
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