method One:
1, a U disk in a place to place an INI file, temporarily named "Changeusb.ini", placed in the root of U disk, INI file only need two lines (red for comment):
SUBJ%curdrv%//Delete the original USB disk letter
Show R:1,u//u disk new allocation letter for u:
2, in the WinPE kernel configuration file with a line of load command, this line of load command recommended after the fixed USB driver, through the load command leader "" Automatically load the "Changeusb.ini" file in the U disk.
3, this method is applicable to the WinPE system can be identified after the launch of the U disk, if the WinPE system can not recognize your USB drive after the boot, you may use the PECMD.EXE Show command to the U disk allocation letter.
4, if you have an INI disk, you can combine these two lines into an existing INI file.
Method Two:
Take advantage of the U parameter of the init command.
1, to the WinPE kernel configuration file pecmd.ini init command plus u parameter;
2. After executing the init command, add the following two lines of code (red for comment):
Team SUBJ%usb%|show r:1,u//delete original U disk letter and reassign the letter to U
Team ENVI $USB =u:| ENVI $USB 1=u://Reset two environment variables related to U disk letter
3, method Two principle and method one is consistent, the advantage is not to place the INI file on the U disk, the result is same with method one.