Set Desired Fan Speed
更新时间： 2026/08/06
在Gitcode上查看源码Set Desired Fan Speed
Change History
| openUBMC Version | Revision Date | Description |
|---|---|---|
| 25.06 | 2025/06/26 | Initial draft: add command details |
Basic Information
Function Description
Set the fan speed.
Privilege
Command Information
Request Information
| Byte | Data Field |
|---|---|
| NetFn | 30h |
| CMD | 92h |
| 1:3 | Manufacturer ID, LS Byte first. The length is fixed to three bytes. For example, if the vendor ID is 2011 and the corresponding hexadecimal value is 0x0007DB, the first byte is DBh, the second byte is 07h, and the third byte is 00h. |
| 4 | Sub command, sub command=10h |
| 5 | base fan id: indicates the start ID of the fan whose speed is to be adjusted. |
| 6:N | fan speed: speed of the fans starting from the base fan ID. If the byte value is 0xFF, the rotational speed of the fan is not changed. |
| Note: This command is used by the in-band management software to send the expected fan speed to the BMC for final synthesis. The expected fan speed is only an input of the BMC heat dissipation module. Whether the fan speed needs to be adjusted depends on whether the fan speed needs to be adjusted. |
Response Information
| Byte | Data Field |
|---|---|
| 1 | Completion Code |
| 2:4 | Manufacturer ID, LS Byte first. The length is fixed to three bytes. For example, if the vendor ID is 2011 and the corresponding hexadecimal value is 0x0007DB, the first byte is DBh, the second byte is 07h, and the third byte is 00h. |
Command Example
Set the fan speed.
Request:
bash
ipmicmd -k "0f 00 MM NN" smi 0Response:
text
0f MM NN