Backup Overwrites DoubleSpace-Compressed Floppy Disks (105183)
The information in this article applies to:
- Microsoft MS-DOS operating system 6.2
- Microsoft MS-DOS operating system 6.22
This article was previously published under Q105183 SYMPTOMS
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.
If you try to back up to a DoubleSpace-compressed floppy disk using
Microsoft Backup or Microsoft Backup for Windows, you receive the
following message:
You have inserted a diskette which contains existing directories and
files. Please insert an empty diskette or choose "Overwrite" to use
the current diskette.
Partial file list
dblspace.000
readthis.txt
NOTE: If you choose "MS-DOS Drive and Path" instead on drive A or drive B,
you receive the message "insufficient disk space in <drive letter>: Backup
to DOS path cannot be completed."
CAUSE
Microsoft Backup writes over your DoubleSpace-compressed floppy disk,
making it an uncompressed disk.
Since Backup compresses data, there is no benefit to writing compressed
data to a compressed disk. Once the data has been compressed once, it
cannot be compressed again.
WORKAROUND
You may be able to work around this problem by choosing MS-DOS Path for
your destination.
| Modification Type: | Major | Last Reviewed: | 11/21/1999 |
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| Keywords: | KB105183 |
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