I encountered such a problem after installing Win2003: Mobile hard disk can't be identified in Win2003, the taskbar also has a mobile hard disk icon, displaying everything is normal, but if you can't find the drive letter, just when I want to solve this problem I found the following article, I have encountered the same experience with the author, I feel very good, I will put this article out for the reference.
CCID News - China Computer News: Zhu Tuquan
The author has always likes to try new software. This is not, the Windows Server 2003 is just coming out, and the author can't wait to install it. However, when the author connects to the IBM mobile hard disk, although the icon of the mobile hard disk appears below the right of the taskbar, the information display is normal, but in "My Computer", it is displayed in the drive. The "Newman" mobile hard disk of the block friend is also not recognized. Try reinstall the driver of the mobile hard drive (originally not installed), the system prompt driver has been installed. The strange thing is that the computer can not recognize the flash memory of the author. The author later read an article about group strategies. This article tells the use of "group strategy" to hide the drive method. Since the "Group Policy" can hide the drive from the drive, then it will not be displayed. The drive letter is displayed? With this problem, the author opened the group policy, the operation steps are: Click "MMC" Enter "MMC" Enter ", enter" Console 1 ", then" File → Add Delete Management Unit → Add, "Add Independent Management Unit" interface, in which "Disk Management" is found, then "Add → Completion → Off → OK", then return "Console 1", click on "Disk Management", when you see all hard drives in the right bar, including mobile hard drives, but do not show drive from the mobile hard disk. The problem of the problem should be here. The author right-click the name of the mobile hard disk, select "Change the drive letter and path" in the pop-up menu, and found that the disk does not dispense the drive number, then click "Add", then select "The following drive letter" is selected, on the right Choose a suitable English letter in the combo box to do the driver number, click OK. Then the mobile hard disk is scanned, and the drive of the mobile hard disk is finally appeared. In order to prove that it is not accidental, the author also did not recognize the mobile hard drive on another computer that just put on Windows Server 2003. The author is set according to the method mentioned above, and the hard disk is revealed. Experience: It is best to select the flash memory and mobile hard disk after selecting the drive number. Otherwise, if only the mobile hard disk is plugged, and then select the English letter next to the CD-ROM. After inserting a flash memory, it is possible that the flash will replace the drive letter of the last set of mobile hard drives, and then insert the mobile hard disk. It may not be recognized.