Tyan S8036 FAN control with ipmi raw command

Enable/Disable Auto Fan Control#

1
ipmitool raw 0x2e 0x6 0xfd 0x19 0x00 ＜0x00|0x01|0xff＞

NOTE
0x00 = Disable
0x01 = Enable
0xff = get current setting

Get/Set PWM Duty#

1
ipmitool raw 0x2e 0x5 0xfd 0x19 0x00 <PWM ID> ＜0x00-0x64|0xfe|0xff>

NOTE
PWM ID : 0,1,2,3,4
0x00-0x64 = 0 -100% duty
0xfe =Get Current PWM Duty
0xff = return to automatic control
CPU_FAN (PWM 0)
SYS_FAN_1 (PWM 1)
SYS_FAN_2(PWM 2)
SYS_FAN_3 (PWM 3)
SYS_FAN_4 (PWM 4)

Query result#

Example:#

the last byte of the response contains the duty value in hexadecimal:

1
ipmitool raw 0x2e 0x5 0xfd 0x19 0x00 1 0xfe
2
fd 19 00 a0

The actual PWM duty percentage is calculated using the following formula:

1
Duty (%) = Decimal(last_byte) - 128

For the above example:

1
0xa0 = 160
2
160 - 128 = 32 (%)

So, the fan is 32% duty.