Partitions Displaying as Unknown in Disk Administrator

ID: Q138923

The information in this article applies to:

Microsoft Windows NT Workstation versions 3.5, 3.51, 4.0
Microsoft Windows NT Server versions 3.5, 3.51, 4.0

SYMPTOMS

Disk Administrator displays an NTFS partition as unknown if the permissions on the root of the partition are changed. When you attempt to access the partition through File Manager, you receive the following error message:

You do not have permissions to access directory.

If you try to access the drive from a command prompt, you receive the following error message:

Access denied.

CAUSE

This occurs when a second partition or volume set is created and the group, "Everyone" is removed from the Access Control List(ACL) and then a specific user is granted access. The single use has normal access, but when other users log on or if Windows NT is reinstalled, Disk Administrator sees the drive as unknown.

RESOLUTION

To correct this problem, log in as an administrator and take ownership of all directories or add the group Everyone back with full control (default).

Additional query words: prodnt

Keywords : kbother ntsecurity ntfilesys
Version : 3.5 3.51
Platform : winnt
Issue type : kbhowto