3. If you are adding a power supply to an empty power-supply bay, remove the
cover from the ac power connector opening on the rear of the server.
4. If you are replacing a failed power supply, remove the failed power supply from
the bay:
a. Disconnect the power cord from the connector on the back of the failed
power supply.
b. Press the locking latch on the power-supply handle and raise the
power-supply handle to the open position.
c. Lift the failed power supply out of the bay.
5. Raise the handle on the new power supply to the open position.
6. Place the new power supply into the power-supply bay in the chassis and fully
close the locking handle.
7. Connect one end of the power cord for the new power supply into the connector
on the back of the power supply; route the power cord through the
cable-management arm and connect the other end of the power cord into a
properly grounded electrical outlet.
8. Make sure that the ac power LED on the rear of the power supply and the ac
power LED on the top of the power supply are lit, indicating that the power
supply is operating correctly. If the server is turned on, make sure that the dc
power LED on the top of the power supply is lit also.
If you have other options to install or remove, do so now; otherwise, go to
“Completing the installation” on page 47.
Installing an adapter
The following notes describe the types of adapters that the server supports and
other information that you must consider when installing an adapter:
v Locate the documentation that comes with the adapter and follow those
instructions in addition to the instructions in this section. If you must change the
switch setting or jumper settings on the adapter, follow the instructions that come
with the adapter.
v See the documentation that comes with the operating system for information
about enabling a hot-plug PCI-X slot.
v Avoid touching the components and gold-edge connectors on the adapter.
v The server supports full-length and half-length, 266 MHz or slower, 3.3 V, 32-bit
or 64-bit PCI and PCI-X adapters.
v The server scans devices and PCI-X slots to assign system resources in the
following order: integrated Ethernet controller, integrated SAS controller, and then
PCI and PCI-X slots 1 through 6.
Note: To change the order in which the server scans devices and PCI-X slots,
start the Configuration/Setup Utility program and select Start Options from the
main menu. See “Using the Configuration/Setup Utility program” on page 58 for
details about using the Configuration/Setup Utility program.
v You do not have to turn off the server to install a hot-plug adapter in any of the
PCI-X slots. However, you must turn off the server when performing any steps
that involve installing or removing cables.
v The optional Integrated xSeries Adapter (IXA) can be installed only in slot 2. You
must move jumpers J35 and J40 on the IXA. For details about installing the IXA,
see the documentation that comes with the adapter.
26 IBM System x3950 Type 8878 and System x3950 E Type 8879: User’s Guide