MS-DOS Application I/O Operations Cause Floppy Drive Access

• Microsoft Windows NT Workstation version 4.0
• Microsoft Windows NT Server version 4.0
• Microsoft Windows NT Server version 4.0, Terminal Server Edition

SYMPTOMS

After you apply Service Pack 3 for Windows NT 4.0, MS-DOS applications may attempt to access the floppy disk drive when performing I/O operations such as File Open or File Save. The floppy disk drive light stays lit for a period of a few seconds up to a few minutes.

CAUSE

With Windows NT Service Pack 3, the NTVDM subsystem has been updated to keep in synchronization with Win32. So, when the MS-DOS application changes the default drive, Windows NT verifies the current directory for the new default drive.

RESOLUTION

To resolve this problem, obtain the latest service pack for Windows NT 4.0 or Windows NT Server 4.0, Terminal Server Edition. For additional information, please see the following article in the Microsoft Knowledge Base:

Q152734 How to Obtain the Latest Windows NT 4.0 Service Pack

STATUS

Microsoft has confirmed this to be a problem in Windows NT version 4.0 Service Pack 3. This problem was first corrected in Windows NT 4.0 Service Pack 4.0 and Windows NT Server 4.0, Terminal Server Edition Service Pack 4.

Additional query words: prodnt 4.0 disk drive A: A drive saving opening edit edit.com servicepack sp sp3

Keywords : NT4SP4Fix kbbug4.00 kbfix4.00.sp4 kbbug4.00.sp3 ntdosap NTSrvWkst
Version : WinNT:4.0
Platform : winnt
Issue type : kbbug