machstat (AIX)

AIX 5.1

The below information is taken from the script /etc/rc.powerfail.

On AIX 5.1, /usr/sbin/machstat -f returns a shell exit code representing the power status. The lower 4 bits are the error code, the upper 4 bits are bits 10-13 of the PKSR register. This only applies to systems of type "rspc", as returned by bootinfo -T.

# /usr/sbin/machstat -f; ret=$?
# error=$(($ret % 16))
# state1=$(($ret / 16))
# echo "Error: $error, state1: $state1"
Error: 0, state1: 2

state1	Description
0	normal operation
1	non-critical cooling problem
2	non-critical power problem
3	severe cooling problem
4	severe power problem

AIX 5.2+

The below information is taken from the script /usr/lib/boot/bin/rc.powerfail_chrp.

On AIX 5.2 and later /usr/sbin/machstat -f writes to stdout two (AIX 5.2) or three (AIX 5.3) integers, being the power and cooling status bits. The first is the "EPOW Event" and the second is the "Modifier".

Eg:

# /usr/sbin/machstat -f
2 0 0

Meanings for the EPOW Event are:

EPOW	Modifier	Description
0		normal operation
1		non-critical cooling problem
2		non-critical power problem
3	1, 3 or 4	severe power problem, immediate shutdown
3	0 or 2	severe power problem, system will shutdown after wait time
4		severe problems, immediate shutdown
5 or 7		unhandled issue

See Also

• machstat manpage for AIX 5.3.
• rc.powerfail manpage for AIX 5.3.