fan(1M)

NAME | SYNOPSIS | DESCRIPTION | OPTIONS | EXAMPLES | SEE ALSO

NAME

fan- display or control fan power and speed

SYNOPSIS

fan
fan -p on
fan -p off [-l {front| rear}] [-t FanTrayList]
fan -s {nominal| fast}

DESCRIPTION

When used without options, the fan command displays the speed and power status of the fans. When used with the -s or -p option, it changes their speed or power status. You can use -l and -t with -p off to specify which fans are to be turned off. fan -p on turns on all fans.

Each Sun Enterprise 10000 system has four fan shelves, two in the front of the cabinet and two in the rear. Each shelf contains four fan trays, for a total of 16 fan trays. Each fan tray can contain two fans (numbered 0 and 1), for a maximum of 32 fans per system.

The fan trays are organized as follows:

Fan trays 0, 1, 2, 3

Shelf 0 at rear-center of the cabinet

Fan trays 4, 5, 6, 7

Shelf 1 at rear-bottom of the cabinet

Fan trays 8, 9, 10, 11

Shelf 2 at front-center of the cabinet

Fan trays 12, 13, 14, 15

Shelf 3 at front-bottom of the cabinet

Every fan tray has an opposite counterpart on a different shelf, but on the same side; one tray sucks air into the cabinet, the other blows it out. For example, Tray 3 of Shelf 0 is opposite Tray 7 of Shelf 1, and Tray 9 of Shelf 2 is opposite Tray 13 of Shelf 3.

OPTIONS

The following options are supported:

-p on

Turn on power to all fans.

-p off

Turn off power to all fans. See also -l and -t, which you can use with -p off to turn off specific fans. In case of conflict, the fans specified by -l take precedence over those specified by -t. See the examples, below.

-l {front | rear}

Turn off power to only the specified front or rear fan shelf and, if applicable, to the fan trays specified by -t. Use this option only with power -p off.

-t FanTrayList

Turn off power to only the specified fan trays and, if applicable, the shelf specified by -l. FanTrayList is a space-separated list of fan tray numbers expressed as integers, 0 to 15 inclusive. Use this option only with power -p off.

-s {nominal | fast}

Set the speed of all fans to either nominal or fast, as specified. All fans in the system run at the same speed. Once you change the fan speed, it remains in effect until changed again via the fan -s command. The default speed is nominal.

EXAMPLES

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Example 1 Setting the Fan Speed




The following command sets the speed of all fans to fast.

fan -s fast

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Example 2 Turning Off the Fans




The following command turns off all fans on the two front fan shelves. The command specifies both a fan shelf (-l) and a list of fan trays (-t), and the former takes precedence.

fan -p off -l front -t 0 1 2

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SEE ALSO

cbs(1M), edd(1M), hostinfo(1M), hostview(1M), snmpd(1M)

SSP 3.5  Last Revised 1 Aug 1999

NAME | SYNOPSIS | DESCRIPTION | OPTIONS | EXAMPLES | SEE ALSO