Microsoft KB Archive/103527
Article ID: 103527
Article Last Modified on 11/21/1999
- Microsoft MS-DOS 6.2 Standard Edition
- Microsoft MS-DOS 6.22 Standard Edition
This article was previously published under Q103527
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.
You are running Microsoft MS-DOS 6.2 DoubleSpace, drive C is compressed, and you receive the following message when attempting to install MS-DOS 6.2 Upgrade or Step-Up:
MS-DOS 6.2 Setup may display this error message if the DoubleSpace compressed volume file (CVF) does not contain a minimum of 4,200,000 bytes of free contiguous hard disk space (even though sufficient hard disk space is reported by CHKDSK or DIR).
To work around this problem, defragment the DoubleSpace-compressed drive using the DoubleSpace Defrag utility. For example, type dblspace /defrag at the MS-DOS command prompt and then press ENTER.
DoubleSpace Defrag optimizes the DoubleSpace CVF and creates a contiguous block of free space in the CVF. You should then be able to successfully run the MS-DOS 6.2 Setup program.
If Setup still reports there is insufficient space, free some space by moving or deleting files from the drive.
IMPORTANT: If you are installing MS-DOS 6.2 Step-Up, do not delete MS-DOS files from your hard disk to free space. Step-Up requires these files to update your system.
MS-DOS 6.2 Setup uses a new DoubleSpace application program interface (API) function when you install over MS-DOS 6.2. The new API call provides Setup with the amount of contiguous free space in the compressed volume file's "sector heap" (data area).
Additional query words: 6.20 BBS MS-BBS dummies stepup