IBM 7012 G Series, Service Manual

Page: 87 / 264

Using SystemGuard
2-57
5. The CPU CARD screen appears and looks similar to the following:
CPU CARD – (CPU1)
PRESENT CONDITIONS: PR #0 –> Valid & Enabled
PR #1 –> Valid & Enabled
COMMANDS: 0> ENABLE
1> DISABLE
2> TEMPORARY DISABLE
SELECT [x:exit]:
6. From this screen, you can disable or enable a particular processor on the selected CPU
card. Option
0
enables a CPU; option
1
disables a CPU, and option
2
temporarily
disables a CPU until the next reboot.
Enabling/Disabling Processors through AIX
The processors can be disabled/enabled through AIX as well. This is done through the
cpu_state command. Following is the command with various options:
•
To list the processors and view their statuses, type
cpu_state –l
. The output should
look something like this:
Name Cpu Status Location
proc0 0 enabled 00–0P–00–00
proc1 1 enabled 00–0P–00–01
proc2 2 enabled 00–0Q–00–00
proc3 3 enabled 00–0Q–00–01
•
To disable a CPU, CPU1 for example, type
cpu_state –d 1
. Look at the result with
cpu_state –l:
Name Cpu Status Location
proc0 0 enabled 00–0P–00–00
proc1 1 disabled 00–0P–00–01
proc2 2 enabled 00–0Q–00–00
proc3 3 enabled 00–0Q–00–01
Note: This change does not take effect until after a reboot. After a reboot, the
cpu_state
–l
command shows:
Name Cpu Status Location
proc0 0 enabled 00–0P–00–00
proc1 – disabled 00–0P–00–01
proc2 1 enabled 00–0Q–00–00
proc3 2 enabled 00–0Q–00–01