envctrl(4) - NetBSD Manual Pages

ENVCTRL(4)          NetBSD/sparc64 Kernel Interfaces Manual         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.

NetBSD 11.99                     July 24, 2026                    NetBSD 11.99