Microsoft KB Archive/70753

= DELOLDOS Command and OLD_DOS Directory Creation Limit =

Article ID: 70753

Article Last Modified on 5/12/2003

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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 Q70753



SUMMARY
In the Microsoft MS-DOS Upgrade for versions 5.0 and later, DELOLDOS command deletes all OLD_DOS.x directories residing in the root directory of the boot drive. Upon deletion of the these directories, DELOLDOS.EXE itself is also deleted from the directory it resides in.

The MS-DOS Upgrade installation process can create a total of 99 old DOS directories named OLD_DOS.:

OLD_DOS.1 ... OLD_DOS.99

The  value is based upon the integer extensions of any previous OLD_DOS directories residing in the root directory of the boot drive, so that  is the next integer available in order starting at 1. When the installation process attempts to create the 100th OLD_DOS directory, it instead replaces the last OLD_DOS directory made, creating a directory with the same name.



MORE INFORMATION
If the current DOS directory in use is deleted prior to installation or not detected when installing, an OLD_DOS.x directory is still created when installing; however, it contains only the README.NOW file. Also, any non- DOS files put into the DOS directory aren't saved in the OLD_DOS.x during installation. Those files are put into the new installed DOS directory instead.

Additional query words: 6.22 5.00 5.00a 6.00 6.20

Keywords: KB70753

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