IBM pSeries 690 Service Manual page 330

Step 1542-6
The Eserver pSeries 690 server must have a minimum of one I/O subsystem and one media subsystem
attached to the processor subsystem. The following steps reduce the system I/O to the required minimum
of one I/O subsystem:
1. Turn off the system power.
2. Verify that processor subsystem RIO port A0 on primary I/O book (U1.18-P1-H2/Q1) is connected to
I/O subsystem 1 left I/O port connector 0 (U1.9-P1/Q2).
3. Verify that I/O subsystem 1 right I/O port connector 1 (U1.9-P2/Q1) is connected to processor
subsystem RIO port A1 on primary I/O book (U1.18-P1-H2/Q2).
4. Verify that I/O subsystem 1 left I/O port connector 1 (U1.9-P1/Q1) is connected to I/O subsystem 1
right I/O port connector 0 (U1.9-P2/Q2).
5. Disconnect cable at processor subsystem RIO port B0 on primary I/O book (U1.18-P1-H2/Q3), if
cable attached.
6. Disconnect cable at processor subsystem RIO port B1 on primary I/O book (U1.18-P1-H2/Q4), if
cable attached.
7. Unplug the secondary I/O book (U1.18-P1-H3), if present, and carefully pull it approximately 25 mm
(1 inch) away from the backplane without disconnecting any cables
8. Unplug the third I/O book (U1.18-P1-H4), if present, and carefully pull it approximately 25 mm (1 inch)
away from the backplane without disconnecting any cables.
9. Connect the previously removed RIO cable from I/O subsystem 1 right I/O port connector 1
(U1.9-P2/Q1) to processor subsystem RIO port A1 on primary I/O book (U1.18-P1-H2/Q2).
10. Verify that the power cable is connected between I/O subsystem 1 right media subsystem power
connector (U1.9-P2-V1/Q3) and the media subsystem.
11. Disconnect power cables from remaining I/O subsystems.
All I/O subsystems except the primary I/O subsystem should now be physically disconnected from the
processor subsystem.
Go to "Step 1542-7" on page 311.
310 Eserver pSeries 690 Service Guide