IBM R30 Operator's Manual page 117

How to Disable and Enable Processors
In the SMP servers, it is possible to disable/enable processors. A suspected faulty processor
can be disabled so that the system can run without it. The processors can be
disabled/enabled through the STAND-BY MENU, MAINTENANCE MENU, Diagnostics, or
through AIX commands.
Enabling/Disabling Processors through the Stand-By Menu
1. Enter the STAND-BY MENU; refer to the STAND-BY MENU section on page 3-12.
2. From the STAND-BY MENU, enter 3 to select the Set Configuration menu. A first-level
screen similar to the following appears:
Set Configuration
00 CPU0
01 CPU1
02 CPU2
03 CPU3
04 MC0
05 MC1
06 MC2
07 MC3
08 basic MCA
09 exp MCA
Select(x:exit): 01
The Set Configuration screen displays the units and devices that can be configured,
along with their menu index number. At this step, CPU0 stands for the CPU card 0, not
processor 0.
3. Enter an index number for a CPU card to be looked at. If you select CPU1 (01), for
example, the following screen appears:
CPU1
00 CPU0
01 CPU0
02 CPU0
03 CPU1
04 CPU1
05 CPU1
Select(x:exit): 04
4. All the CPUs and their statuses are displayed, where:
C
D
T
10 UNIT0 & dev
11 UNIT1 & dev
12 UNIT2 & dev
13 UNIT3 & dev
14 UNIT4 & dev
15 UNIT5 & dev
16 UNIT6 & dev
17 UNIT7 & dev
Set | Status
C C
D
T
C C
D
T
stands for configured
stands for disabled
stands for temporarily disabled. It means that at the next power on or reset,
the device is automatically reconfigured.
3-55
Using SystemGuard