Converting Stacker-Compressed Removable Disks (95348)
The information in this article applies to:
• Microsoft MS-DOS operating system 6.0
• Microsoft MS-DOS operating system 6.2
This article was previously published under Q95348
To convert a Stacker version 2.x or 3.0 compressed floppy disk to a
DoubleSpace-compressed disk using the Conversion Disk for Users of Stacker,
you must have approximately 900 kilobytes (K) of free disk space on the
floppy disk. To convert a Stacker-compressed removable media disk (such as
Bernoulli disks and removable optical disks), you must have approximately 1
megabyte (MB) of free disk space on the removable disk. The free disk space
can be either at the end of the Stacker volume file (SVF) or on the
uncompressed portion of the disk.
If you do not have enough free disk space to compress a removable disk and
you cannot remove any files to create more free disk space (or the disk
capacity is less than 900K [360K or 720K]), use the procedure below, which
was taken from the README.TXT file.
DoubleSpace requires 900K free disk space so that it can create a 512K
DoubleSpace compressed volume file (CVF). DoubleSpace also requires 400K-
500K free disk space so that it can internally defragment a highly
If DoubleSpace cannot convert a Stacker-compressed volume file due to disk
space limitations, do the following:
• Insert the floppy disk in drive A or B.
• Copy the STACVOL.DSK file to the host drive on your hard disk. If
you don't know which drive is your host drive, type dblspace /list at the MS-DOS command prompt and then
When you copy the file, change its extension to .001. For example,
if the floppy disk is in drive A, and your host drive is drive D,
type the following at the MS-DOS command prompt and press ENTER:
If you have insufficient disk space, start DoubleSpace by typing
dblspace at the MS-DOS command
prompt, and choose Change Size from the Drive menu. Make the size of
the uncompressed drive large enough to contain the SVF.
copy a:\stacvol.dsk d:\stacvol.001
• Covert the compressed volume file to DoubleSpace format, as in the
After DoubleSpace converts the file, it mounts the file.
• If are using Stacker version 2.0, delete the STACKER.DRV file on
the floppy disk. If you are using Stacker version 3.0, delete the
STACKER.EXE and README.STC files.
• Delete the STACVOL.DSK file on the floppy disk.
• Make sure your floppy disk is in drive A or B and then compress it
by choosing Existing Drive from the Compress menu in DoubleSpace.
Follow the instructions on your screen.
DoubleSpace mounts the floppy drive after it finishes compressing the
• Quit DoubleSpace.
• Use the XCOPY command to copy all the files on the new compressed
drive on your hard disk to the compressed floppy disk. For example,
if the compressed drive is J, and the floppy disk is in drive A,
type the following at the MS-DOS command prompt and then press
• Delete the compressed drive on your hard disk. For example, if your
compressed drive is J, type the following at the MS-DOS command prompt
and press ENTER:
To confirm the deletion, type Y.
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