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ART11
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1993-09-27
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Stacker 3.1
for Windows and DOS
by Tony Curro
Stac Electronics has longed been a leader in data compression. I can
remember several programs that I have used, mainly for backup, where
I would see that the compression routines were licensed from Stac.
They are also the makers of Stacker, which is available on several
platforms.
Stacker 3.1 for Windows and DOS can be installed from either
platform. It comes with two sets of disks. One set is for DR DOS and
all versions of DOS up to 5.x. The second set is specifically for
MS-DOS 6.0 users. Stacker 3.1 will automatically convert DoubleSpace
files into Stacker drives.
Features include:
* Two-gigabyte Stacker drives.
* Compress RAM drives.
* Full EMS support
* AutoProtect
* AutoRecovery
* Compression Tuning
* Stacker Anywhere
* Stacker Automount
* Unstack
Stacker 3.1 will create a group in Windows, and add itself to
Windows File Manager. By adding itself to File Manager's toolbar you
have the following features:
* File Info to view compression information on selected files.
* Disk Info to display the kilobytes used and free for the entire
compressed disk along with the expected and actual compression
ratios for the selected drives.
There are three compression methods you can use with Stacker. These
are: Fastest speed and standard compression; More compression and a
bit less speed; Best compression. The default is the first one. The
whole installation of Stacker is seamless. About all the user has to
do is insert and change disks, and start the program. Selecting the
defaults throughout the program will compress all drives on your
system. The manual even explains how to create a Stacker-aware boot
floppy. Speaking of the manual, it is well documented, and should
get you through any problems you may encounter. I did not have any
encounters, and I have a large assortment of "stuff" in my system.
It did work that well.
I installed Stacker on one drive, accepting the default compression
method. These are the results:
Before Stacker After Stacker
170MB drive 280MB drive
34MB Free 168MB Free
I did have almost 12 MB of ZIP or other compressed files on this
drive that, since they are already compressed, cannot be further
compressed. Stacker took about 30 minutes to do the above.
When you run the program called STAC, from a DOS prompt, you get the
Stacker Toolbox. This allows you to Stac or UnStac a floppy,
removable disk or another hard drive. Get compression report or
change the compression ratio. Check drive integrity, optimize, tune
drive, set drive size, and more.
I chose the option to UnStac the above drive. This worked
flawlessly, and I did not lose any data. You must remember, that if
you ever UnStac a volume, that the uncompressed data does not exceed
the actual (not Stacked) size of the drive. Had I added 40 or 50
megs of data to the above drive, I would have had a problem.
Stacker 3.1 is compatible with popular disk utilities and caching
programs. It is also fully compatible with permanent Windows swap
files. I had one on the above drive, and Windows performed as usual
after installation of Stacker. There is also a Stackometer in
Windows that allows you to monitor disk capacity, compression ratio
and fragmentation levels.
Registered users of version 3.0 can upgrade to 3.1 for $19.95. If
you purchased v3.0 after March 30, 1993, you qualify for a free
upgrade.
If you are in the market for a data compression program, my money is
on Stacker. As mentioned, it is the leader. While other may imitate,
or try to imitate, there is only one leader in this field and its
name is Stacker.
Product Information
Stacker 3.1
for Windows and DOS
List Price -- $149.
Stac Electronics
5993 Avenida Encinas
Carlsbad, CA 92008
619-431-7474
619-431-0880