Installation guide

_______________________ Note _______________________
In the unlikely event that the processor cannot be halted the
system must be reset by momentarily setting the four way
OFF/ENABLE switch to the RESET position, then releasing it.
The following procedures only work if the Power OFF/ENABLE switch is in
the ENABLE position.
Primary Partition
Typing ctrl/p on the primary console terminal will force the primary
processor to enter console mode and display the P##>>> prompt. You can
use the stop N command (where N is a processor number) to stop
secondary processors (though this is not normally necessary). See
Section E.4.2.1 for definitions of the console prompt and the stop command.
Secondary Partitions
Secondary partitions will not halt in response to a ctrl/p command on the
secondary console terminal. To force a secondary partition to enter console
mode as folows:
1. Shut down the operating system on the primary partition as follows:
# /usr/sbin/shutdown -h +5 "Shutting down the OS"
2. Stop the primary processor of the secondary partition.
P00>>>stop N
Where N is the CPU number of the primary processor of the secondary
partitions (normally the lowest numbered CPU assigned to the
secondary partition). For example:
P00>>>stop 4
E.4.6.4 Power OFF/ENABLE Switch Position
During normal system operation, the Power OFF/ENABLE switch should
be set to the SECURE position. This will prevent accidentally halting the
processor with ctrl/p.
E.4.6.5 Reconfiguring Partitions by Changing Console EVs
The console EVs that control logical partitions (names begin with lp_)
must not be changed on any secondary partition. These console EVs can
only be changed by shutting down all partitions and setting new values on
the primary partition’s console terminal.
E–24 Administering Specific Hardware