How to Make an MS-DOS 5.0 Boot Disk with Windows NT

ID: Q102901

The information in this article applies to:

SUMMARY

It is possible to make an MS-DOS bootable disk when running Windows NT if MS-DOS version 5.0 is being used on drive C. If a machine running Windows NT has any other version of MS-DOS installed, the error message "Incorrect DOS Version" will be returned when attempting the SYS or FORMAT A: /S commands.

Note: This information is specific to the Intel x86 hardware platform.



To create a bootable disk with Windows NT, use the following procedure:

  1. Log on to Windows NT using an account with Administrator privileges.


  2. Place a blank floppy disk in the drive A.


  3. Select File, choose Run from Program Manager's menu, type C:\DOS\COMMAND.COM, then choose OK. This will start a virtual MS-DOS machine (VDM). The copy of COMMAND.COM in the MS-DOS directory must be used.


  4. From the MS-DOS directory (C:\DOS), type the FORMAT A: /S command.


  5. To boot from the disk, a valid COMMAND.COM must be copied to it. Use File Manager or the VDM to copy the correct version of COMMAND.COM from the C:\DOS directory to the floppy disk. COMMAND.COM should have the following attributes: 

    
      Size = 47845   Date = 4-9-91     Time = 5:00 am  for version 5.0
      Size = 47895   Date = 11-11-91   Time = 5:00 am  for version 5.0a



The floppy disk should now be able to boot as expected; it will be an MS-DOS 5.0 boot disk.


MORE INFORMATION

If a valid COMMAND.COM is not copied to the floppy disk and you attempt to boot from it, the system will hang. An incorrect copy of COMMAND.COM is copied to the floppy disk by Windows NT during the format. This copy is located in the \WINNT\SYSTEM32 directory. The incorrect copy will have these attributes: 


   Size = 49931   Date = 7-24-93    Time = 5:11 am

Additional query words: prodnt nthowto 


Keywords          : kbusage ntdosap NTSrvWkst 
Version           : 3.1 4.0
Platform          : winnt 
Issue type        :

Last Reviewed: January 14, 1999