Microsoft KB Archive/73264

= Setup Unable to Upgrade Disk Manager Partitions > 512 MB =

Article ID: 73264

Article Last Modified on 11/23/1999

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APPLIES TO


 * Microsoft MS-DOS 5.0 Standard Edition

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This article was previously published under Q73264



SUMMARY
If you are running MS-DOS versions 3.x with an Ontrack Disk Manager partition that is larger than 512 MB, the Microsoft MS-DOS 5 Upgrade Setup program cannot convert the partition to an MS-DOS 5.0-compatible partition. This occurs because the Disk Manager partition sector sizes are not a power of 2.

If you replace your old Disk Manager DMDRVR.BIN driver with the DMDRVR.BIN shipped with the MS-DOS 5.0 upgrade and use the SETUP /U command, MS-DOS 5.0 will be installed. Upon booting the machine after upgrading, however, Disk Manager will display the following message:

Partition at.... = *NOT CONVERTED*, Invalid Sector Size

You will not be able to access the unconverted partition.



WORKAROUND
To work around this problem, uninstall to MS-DOS 3.x. Even though you replaced the Disk Manager device drivers, they will work with MS-DOS 3.x and the partition will be accessible. Contact Ontrack to get an upgraded version of Disk Manager and instructions to make that partition compatible with MS-DOS 5.0.

Additional query words: 5.00

Keywords: KB73264

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