How to control fan settings of Supermicro X10 motherboards

supermicro_x10_fans.md

Supermicro X10 Fans

How to control fan settings of Supermicro X10 motherboards

References:

• https://forums.servethehome.com/index.php?threads/big-fan-troubles-with-supermicro-x10sl7-f.13389/
• https://forums.servethehome.com/index.php?resources/supermicro-x9-x10-x11-fan-speed-control.20/

Get fans speed and thresholds

ipmitool sensor

Set fan speed low thresholds

If a fan spins slower than its critical threshold, the fans will be set to full speed

ipmitool sensor thresh FANX lower NR CT NC with:

• FANX: FAN1, FAN2, FAN3, FAN4 or FANA
• NR: non-recoverable low threshold in RPM
• CT: critical low threshold in RPM
• NC: non-critical low threshold in RPM

For example:

ipmitool sensor thresh FAN1 lower 0 100 2400
ipmitool sensor thresh FAN2 lower 0 100 700
ipmitool sensor thresh FAN3 lower 0 100 700

Set fan speed high thresholds

If a fan spins faster than its critical threshold, the fans will be set to full speed

ipmitool sensor thresh FANX upper NC CT NR with:

• FANX: FAN1, FAN2, FAN3, FAN4 or FANA
• NC: non-critical high threshold in RPM
• CT: critical high threshold in RPM
• NR: non-recoverable high threshold in RPM

For example:

ipmitool sensor thresh FAN1 upper 2800 25000 25000
ipmitool sensor thresh FAN2 upper 2500 25000 25000
ipmitool sensor thresh FAN3 upper 2500 25000 25000

Get fan control mode

ipmitool raw 0x30 0x45 0x00

Result	Mode
0	Standard
1	Full
2	Optimal
4	HeavyIO

Set fan control mode

Mode	Command
Standard	ipmitool raw 0x30 0x45 0x01 0
Full	ipmitool raw 0x30 0x45 0x01 1
Optimal	ipmitool raw 0x30 0x45 0x01 2
HeavyIO	ipmitool raw 0x30 0x45 0x01 4

Get the duty cycle of fans in a zone

Zone	Fans	Command
System	FAN1..4	ipmitool raw 0x30 0x70 0x66 0x00 0
Peripheral	FANA	ipmitool raw 0x30 0x70 0x66 0x00 1

The result is the hexadecimal value of the duty cycle in %, ie:

Result	Duty cycle
00	0%
01	1%
...	...
0a	10%
0b	11%
...	...
63	99%
64	100%

Set the duty cycle of fans in a zone

It may be needed to set the fan control mode to Full before that. (to be confirmed)

Zone	Fans	Command
System	FAN1..4	ipmitool raw 0x30 0x70 0x66 0x01 0 X
Peripheral	FANA	ipmitool raw 0x30 0x70 0x66 0x01 1 X

With X being the desired duty cycle in %, eg: ipmitool raw 0x30 0x70 0x66 0x01 0 30 for 30%