ENVCTRL(4)

NAME
envctrl - Sun Ultra Enterprise 250 and 450 environmental monitoring

SYNOPSIS
envctrl* at ebus?

DESCRIPTION
The envctrl driver provides thermal monitoring of processors and power supplies, as well as automatic fan regulation. The driver attaches to the ‘SUNW,envctrl’ subsystem found on Ultra Enterprise 450 systems, and to the ‘SUNW,envctrltwo’ subsystem found on Ultra Enterprise 250 systems.

On Enterprise 450 systems, the following sensors can be queried with envstat(8):
Sensor | Units | Description
CPU0 | degC | Processor 0 temperature
CPU1 | degC | Processor 1 temperature
CPU2 | degC | Processor 2 temperature
CPU3 | degC | Processor 3 temperature
PS0 | degC | Power supply 0 temperature
PS1 | degC | Power supply 1 temperature
PS2 | degC | Power supply 2 temperature
ambient | degC | Ambient temperature
cpufan voltage | V | Voltage used to drive processor fans
psfan voltage | V | Voltage used to drive power supply fans
ps failed | count | Number of failed power supplies
fans failed | count | Number of failed fans

whilst the following sensors can be queried on Enterprise 250 systems:
Sensor | Units | Description
PDB | degC | Power distribution board temperature
SCSI | degC | SCSI temperature
CPUFAN | V | CPU relative fan speed
CPU0 | degC | Processor 0 temperature
CPU1 | degC | Processor 1 temperature
MB0 | degC | Motherboard temperature 0
MB1 | degC | Motherboard temperature 1

SEE ALSO
envsys(4), envstat(8)

BUGS
Environmental interrupts are not supported.