This information applies to both Microsoft DoubleSpace and Microsoft
DriveSpace. For MS-DOS 6.22, use DRVSPACE in place of DBLSPACE for commands
If a special device driver is necessary to use a drive (other than
your startup drive), you can compress that drive with DoubleSpace.
However, when you start your computer, DoubleSpace does not
automatically mount the drive because DoubleSpace cannot access the
drive at system startup.
If you cannot access your compressed drive after installing
DoubleSpace on your Hardcard, try one of the following:
• Edit your AUTOEXEC.BAT file to add the DBLSPACE /MOUNT command to
mount the compressed volume file on the Hardcard each time you
start your computer.
• Verify that your CONFIG.SYS file loads at least one device driver
(for example, ANSI.SYS) after the device driver for your Hardcard
but before the DBLSPACE.SYS driver.
For more information, see section 4.2c of the README.TXT file.
NOTE: If your startup drive requires a device driver in CONFIG.SYS, do
not compress that drive. If you compress the startup drive, your
computer cannot start properly because DoubleSpace cannot access the
To install DoubleSpace on a computer where the startup drive requires
a special device driver, use DoubleSpace Setup to compress a drive
other than your startup drive, or use DoubleSpace Setup to create a
new compressed drive using free space on any existing drive.
For more information on using DoubleSpace to compress a startup drive
that requires a driver in CONFIG.SYS, query on the following words in
the Microsoft Knowledge Base:
hardcard and startup and compressed and dblspace