Microsoft KB Archive/94334

= Using MS-DOS Upgrade Fdisk Program with EXTDISK.SYS =

Article ID: 94334

Article Last Modified on 11/21/1999

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APPLIES TO


 * Microsoft MS-DOS 6.0 Standard Edition
 * Microsoft MS-DOS 6.2 Standard Edition
 * Microsoft MS-DOS 6.21 Standard Edition
 * Microsoft MS-DOS 6.22 Standard Edition

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This article was previously published under Q94334



SUMMARY
If were using COMPAQ MS-DOS version 4.0 or later before you upgraded to MS-DOS 6.0 or later, and you are using EXTDISK.SYS, you should use the COMPAQ version of the Fdisk program. If you were using COMPAQ MS-DOS version 3.31 or earlier before you upgraded to MS-DOS 6.0 or later, and you are using EXTDISK.SYS, you should contact Compaq for an updated version of EXTDISK.SYS.



MORE INFORMATION
Some COMPAQ systems use a driver called EXTDISK.SYS to access secondary disk drives. This driver is MS-DOS version-dependent. If you use the MS-DOS version of Fdisk when EXTDISK.SYS is loaded, Fdisk displays incorrect drive letters for the hard disks attached to the second controller.



WORKAROUND
You can work around this problem by using the COMPAQ version of Fdisk. To install the old version of Fdisk:

 Delete FDISK.EXE from the DOS directory.  Copy FDISK.* from your COMPAQ MS-DOS disks to your DOS directory. For example:      copy a:\fdisk.* c:\dos   Add Fdisk to the SETVER.EXE version table for your version of COMPAQ MS-DOS. For example:      setver fdisk.exe 4.0  Restart your computer.

NOTE: You must use SETVER to tell EXTDISK.SYS that you are using a previous version of MS-DOS. For more information, query on the following words in the Microsoft Knowledge Base:

MS-DOS and SETVER and EXTDISK.SYS

Additional query words: 6.22 6.00 6.20 EXTDRV.SYS

Keywords: KB94334

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