Microsoft KB Archive/89723

= Zenith 8086/8088 720K Floppy Drive with MS-DOS =

Article ID: 89723

Article Last Modified on 11/16/2006

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APPLIES TO


 * Microsoft MS-DOS 5.0 Standard Edition
 * Microsoft MS-DOS 5.0a
 * 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 Q89723



SUMMARY
After you install MS-DOS any Zenith 8086- or 8088-based computer, the 3.5- inch disk drive formats as a 360K drive only.



MORE INFORMATION
Neither the DRIVPARM command nor the DRIVER.SYS device driver work on Zenith 8086- and 8088-based computers. If the following DRIVPARM or DRIVER.SYS statements are added to the CONFIG.SYS file:   device=[drive:]\[path]\DRIVER.SYS /d:[disk drive number] /f:7 -or-   drivparm=/d:[disk drive number] /f:7 the following error message is displayed:

Invalid parameter. This mode not supported, formatting 360K.

If you place a 720K 3.5-inch disk in the drive and attempt to read from the drive, the following error is displayed:

Invalid media, non-DOS diskette.

According to Zenith technical support, there is no way to force MS-DOS 5.0, 6.0, or 6.2 (either retail or OEM versions) to recognize the drive as a 720K disk drive.

The products included here are manufactured by Zenith, a vendor independent of Microsoft; we make no warranty, implied or otherwise, regarding these products' performance or reliability.

Additional query words: 6.22 msdos dos 5.00 5.00a high low density 6.00 3rdparty 6.20

Keywords: KB89723

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