Windows Explorer Error: Unable to Copy Disk on This Drive (166791)


The information in this article applies to:

  • Microsoft Windows NT Workstation 4.0
  • Microsoft Windows NT Server 4.0
This article was previously published under Q166791

SYMPTOMS

While using Windows Explorer to copy a disk, the following error is returned:
COPY DISK - error: unable to copy disk on this drive.

CAUSE

While the drive is selected in the left pane in Windows Explorer, there is an open handle to the drive to display its contents in the right pane. This causes a conflict between the two processes, as each tries to access the same resource.

RESOLUTION

Use one of the following workarounds:
  • Use My Computer instead of Windows Explorer to copy the disk. -or-

  • While in Windows Explorer, double click the My Computer icon in the left pane and then use the floppy (A:) drive in the right pane to copy the disk.
Either of these two procedures allows you to copy a disk, if the drive is not in use by any other process or application.

STATUS

Microsoft has confirmed this to be a problem in Windows NT version 4.0. We are researching this problem and will post new information in the Microsoft Knowledge Base as it becomes available.
Modification Type:MajorLast Reviewed:8/9/2001
Keywords:kbbug kbui KB166791
©2002 Microsoft Corporation. All rights reserved.