Registrations are now open. Join us today!
There is still a lot of work to do on the wiki yet! More information about editing can be found here.
Already have an account?

Microsoft KB Archive/101703

From BetaArchive Wiki
Knowledge Base

Windows NT Tries to Duplicate MS-DOS Drive Letter Scheme

Article ID: 101703

Article Last Modified on 11/1/2006


  • Microsoft Windows NT Advanced Server 3.1
  • Microsoft Windows NT Workstation 3.1
  • Microsoft Windows NT Advanced Server 3.1

This article was previously published under Q101703


Windows NT attempts to assign drive letters to partitions in the same manner that MS-DOS does. However, there are cases in which drive letter assignments are not the same.


Consider the following example in which a system has two hard disks, each of which has two partitions:

Windows NT assigns drive letters as follows:

      | C: FAT | E: NTFS |

      | D: FAT | F: FAT  |

However, MS-DOS assigns drive letters as follows:

      | C: FAT | Unknown |

      | D: FAT | E: FAT  |

Because MS-DOS does not recognize the NTFS partition, it marks the partition as "unknown" and does not assign it a drive letter.

NOTE: In Disk Administrator, you can customize the drive letter assignments by choosing Drive Letter from the Partition menu.

Additional query words: prodnt

Keywords: kbother KB101703