Microsoft Knowledge Base
FastTips: MS-DOS 6.2 DoubleSpace Questions and Answers
Last reviewed: November 23, 1994
Article ID: Q105072
The information in this article applies to:
- Microsoft MS-DOS operating system versions 6.2, 6.22
IMPORTANT: Although the text in the following questions and answers specifically refers to MS-DOS 6.2 DoubleSpace, the information also applies to MS-DOS 6.22 DriveSpace. If you have MS-DOS 6.22, substitute DRVSPACE for any DBLSPACE commands.
1. Q. What new features does MS-DOS 6.2 DoubleSpace include?
A. Microsoft DoubleSpace has several new features that add an
increased layer of data protection and ease of use. For example:
- DoubleSpace installation procedure now calls ScanDisk, a new
utility that detects, diagnoses, and repairs disk errors on
uncompressed drives and DoubleSpace-compressed drives.
- DoubleSpace now includes DoubleGuard safety checking, which
protects against data corruption by verifying data integrity
before writing to your disk.
- DoubleSpace automatically mounts compressed floppy disks and
other compressed removable media even when Windows is
running.
- With MS-DOS 6.2, you can easily uncompress a DoubleSpace
drive or even completely uninstall DoubleSpace from memory.
- You can bypass DoubleSpace when you start your computer to
make troubleshooting easier and also temporarily free memory
for use by other applications.
For more information, type "help whatsnew" or "help dblspace"
(without the quotation marks) at the MS-DOS command prompt and
then press ENTER.
2. Q. I am currently using a third-party disk-compression software package
and now want to convert to DoubleSpace. How can I do this?
A. If you use a third-party disk-compression program, you need to back
up your program and data files, install MS-DOS 6.2, remove your
third-party disk-compression software, compress your drives with
DoubleSpace, and then restore your program and data files.
For more detailed information, order FastTips Technical Library
item Q103949, titled "Converting to DoubleSpace from Third-Party
Disk Compression."
3. Q. I installed DoubleSpace and now each time I enter Microsoft
Windows I receive the error "Corrupt Swapfile Warning." I have
set up my permanent swap file many times, but I continue to
receive this error. How can I correct this problem?
A. In this case, the error "Corrupt Swapfile Warning" probably
means your permanent swap file is being created on a DoubleSpace-
compressed volume. Windows cannot create a permanent swap file
on a compressed volume. To correct this problem, set the
permanent swap file to an uncompressed drive, such as your host
drive.
Windows cannot detect DoubleSpace-compressed drives because
Windows' release predates the release of DoubleSpace.
4. Q. Because DoubleSpace has assigned drive F (or higher) for its
own use, my Novell NetWare logon scripts no longer work. How can I
correct this problem?
A. The drive letter F (normally used by Novell NetWare) may be used
by DoubleSpace. To work around this situation, you can either
use a different drive letter for your login drive, or adjust
DoubleSpace so that it uses a different drive letter for its
host drive.
If your usual NetWare drive letter is unavailable, use one of
the following methods to change the DoubleSpace host drive
letter:
- Ensure any C:\DOS\DBLSPACE.SYS commands are placed before any
RAMDRIVE.SYS statements in your CONFIG.SYS file.
-or-
- Use the DBLSPACE /HOST command to change the host drive
letter.
NOTE: You can usually avoid this problem by making sure your
NetWare software is loaded before you run DoubleSpace to
compress your drives.
For specific instructions to correct this situation, order
FastTips Technical Library item Q97565, titled "Novell Login
Drive Not Available After Installing DoubleSpace."
5. Q. I occasionally receive a red full-screen DoubleGuard error
message and my computer stops responding (hangs). What is
causing these errors and how can I prevent them?
A. DoubleGuard ensures your data is safe by verifying data
integrity before writing data to your disk. If DoubleGuard
detects that the memory DoubleSpace is using has been corrupted
by another program, it shuts down your computer immediately to
minimize damage to your data.
If you are consistently getting DoubleGuard errors when you run
a particular application, the application is likely overwriting
DoubleSpace information in memory. For more information and
assistance in troubleshooting this problem, contact the
application software vendor.
If there is no particular pattern to the DoubleGuard errors, you
may have a conflict between device drivers and/or terminate-and-
stay-resident (TSR) programs in your CONFIG.SYS and AUTOEXEC.BAT
files. For more detailed information on troubleshooting your
CONFIG.SYS and AUTOEXEC.BAT files, order FastTips Technical
Library item Q68128, titled "Troubleshooting the CONFIG.SYS and
AUTOEXEC.BAT Files."
KBCategory: kbtool kbfasttip Last reviewed: November 23, 1994 |
