Create USB Mass Storage
更新时间： 2026/08/06
在Gitcode上查看源码Create USB Mass Storage
Change History
| openUBMC Version | Revision Date | Description |
|---|---|---|
| 25.06 | 2025/06/26 | Initial draft: add command details |
Basic Information
Function Description
Create a link to the USB storage device.
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=25h |
| 5 | Parameter Selector, parameter selection=00h 00h: Create USB Mass Storage 03h: Close USB Mass Storage |
| 6 | Location: 0: local USB flash drive (The internal flash memory of the BMC is virtualized as a USB flash drive.) |
| 7 | type: 0: temporary mounting (In temporary mounting, x86 only reads the USB flash drive, and the BMC can also read and write the USB flash drive.) 1: formal mounting (During formal mounting, the x86 can read and write the USB flash drive, but the BMC cannot access the USB flash drive.) |
| 8 | device id: 0: iBMA USB flash drive 1: SP USB flash drive NOTE: To be compatible with earlier versions, this byte is not mandatory. If this byte is unavailable, the operation can be performed only on the SP USB flash drive. |
Response Information
| Byte | Data Field |
|---|---|
| 1 | Completion Code NOTE: For a long-delay IPMI command, the returned value does not indicate the operation result. You can query the operation result by running the Get USB Mass Storage Status command with the parameter set to 01h.For the SP USB flash drive, an error code (error code = 0xCE) is returned for the request after the non-system interface or BIOS startup is complete.For an iBMA USB flash drive, an error code 0xCE is returned if the system is powered off or the BIOS startup is not complete.When the USB port is used by other devices, an error code (error code = 0xC1) is returned.If there is no iBMA partition or no iBMA installation package, an error is returned (error code = 0xD5). |
| 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. |
| 5 | reserved |
Command Example
Query the heat dissipation mode.
Request:
bash
ipmicmd -k "0f 00 MM NN" smi 0Response:
text
0f MM NN