Specifications

The fantool uses long options which requires two hyphens in front of the options. Options are required,
optional, or none. If you require a parameter, specify it and include an equal sign; if a parameter is optional,
enclose it with square brackets to show that it is optional (but do not type the brackets at the CLI). For
example, --fan is optional and enter it as --fan=1 or --fan=all, and so forth. Parameters with angle
brackets are required but have multiple options for the input. Do not type the angle brackets or the vertical
line character in the CLI. Only use one option per command; for example,
--fan=1 or --fan=all.
• test — Runs through the speeds for the fan, from highest to lowest, and checks that the fan can run at
the speeds of the test. If a single fan is listed on the CLI, that fan is tested. If you use the
all option, all
fans are tested. The number in the parentheses during the test is the speed the system tries to reach
during the test. If a fan cannot reach the desired speed within an acceptable range after 10 checks, the
fan fails for that speed and the system moves on to the next fan.
• get — Gets the speed of the fan and returns it in the rate process module (RPM).
• set — Sets the speed of the fan in the RPM.
NOTE: Commonly, fan speeds are in two registers and must be written in a specific order. The write
command cannot change the fan speeds; use the set command.
Output
test Output
root@dell-diag-os:~# fantool --test --lpc
Fan Controller Test LPC....................................
Max number of Fan Trays in the System : 4
Number of fans per tray : 1
Max Fan Speed set(PWM): 255
Getting Details for Fan 1
Fan 1 is Present
Fan 1 Air flow type is Front To Rear
Fan 1 status Normal
Fan 1 speed is 3523 RPM
Getting Details for Fan 2
Fan 2 is Present
Fan 2 Air flow type is Front To Rear
Fan 2 status Normal
Fan 2 speed is 3545 RPM
Getting Details for Fan 3
Fan 3 is Present
Fan 3 Air flow type is Front To Rear
Fan 3 status Normal
Fan 3 speed is 3545 RPM
Getting Details for Fan 4
Fan 4 is Present
Fan 4 Air flow type is Front To Rear
Fan 4 status Normal
Fan 4 speed is 3504 RPM
Fan Controller Test LPC.................................... Passed
root@dell-diag-os:~# fantool --get --lpc
Fan 1 speed is 3536 RPM
Fan 2 speed is 3552 RPM
Fan 3 speed is 3552 RPM
Fan 4 speed is 3507 RPM
root@dell-diag-os:~# fantool --get --fan=2 --lpc
Fan 2 speed is 3552 RPM
Dell DiagOS Tools 42