Why DoubleSpace Leaves 2 Megabytes Free on the Host Drive (96593)

The information in this article applies to:
    Microsoft MS-DOS operating system 6.0
    Microsoft MS-DOS operating system 6.2
    Microsoft MS-DOS operating system 6.21
    Microsoft MS-DOS operating system 6.22

This article was previously published under Q96593
This information applies to both Microsoft DoubleSpace and Microsoft DriveSpace. For MS-DOS 6.22, use DRVSPACE in place of DBLSPACE for commands and filenames.


When you compress an existing drive, DoubleSpace leaves approximately 2 megabytes free on the host drive. This space is reserved for files that DoubleSpace needs (after rebooting) while compressing an existing drive.


The following files are stored on the host drive when you compress an existing drive:


DoubleSpace also stores copies of the AUTOEXEC.BAT and CONFIG.SYS files on the uncompressed portion of the host drive as follows:


NOTE: If there are already AUTOEXEC.000 or CONFIG.000 files on the host drive, DoubleSpace uses 001 for the file extension. If that filename is used, DoubleSpace uses 002, and so forth.

These files are also used when you create a new DoubleSpace drive or change the size of an existing DoubleSpace drive.

The unused portion of the 2 megabytes of reserved space is used during the compress an existing drive process.

Modification Type: Major Last Reviewed: 11/26/1999
Keywords: KB96593