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31701.TXT
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1993-06-30
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_______________________________________________________________
STACKER NOTE STACKER NOTE
Title: REPLACING BAD OR MISSING SYSTEM FILES
(Applies to Stacker for Windows & DOS 3.1 and DOS 6)
STAC FAX 31701 (6/93)
_______________________________________________________________
BACKGROUND
All bootable drives must contain the hidden DOS system files
(usually IO.SYS and MSDOS.SYS or IBMBIO.COM and IBMDOS.COM).
With the advent of DOS 6, DoubleSpace, and Stacker 3.1, a
third system file is required to gain access to the data if
the user chooses to use compression. If the user chooses
Stacker compression, this file is the Stacker-aware
DBLSPACE.BIN. If any of the system files have been damaged,
your system may not start or you may receive a "Non-System
disk or disk error" message.
SOLUTION
If you receive a "Non-System disk or disk error" message
To restore the DOS system files and still have access to your
compressed data do the following:
1. Insert the Stacker Startup Disk that you created after
you ran Stacker Setup, in drive A.
2. If you do not have a Stacker Startup disk, you can
create one from your DOS 6 upgrade disks.
a. Insert the first DOS Upgrade disk into drive A or B
and switch to that drive. Type:
SETUP /F <Enter>
This process creates a separate, bootable MS-DOS 6
system disk with essential utilities on it
b. To make the new system disk "Stacker-aware," follow
the instructions on page 18 of the Stacker 3.1
Supplement Manual.
3. Restart your system.
4. From the prompt, type:
drive:\path\STACKER <Enter>
where drive is the drive letter where your Stacker
program files are located and path is the directory
containing the files.
_______________________________________________________________
Copyright 1993, Stac Electronics Page 1 of 3
5. Note the drive letter in the square brackets to the
right of the boot-time information for Stacker drive C.
This letter is the uncompressed drive for Stacker drive
C. (If drive C is not compressed, the appropriate drive
letter is C.)
6. From the prompt, type:
SYS drive: <Enter>
where "drive" is the letter of the uncompressed drive
for Stacker drive C.
7. Remove your Stacker Startup Disk from drive A and
restart your computer.
If your system won't start or Stacker won't load
You probably have a bad or missing Stacker-aware DBLSPACE.BIN
file. To repair the file, first follow Steps 1 through 7 in
the procedure listed above. If you still can't access the
data on your Stacker drive:
1. Insert Stacker Disk 1 into drive A or B.
2. Change to the floppy disk drive by typing:
A: or B: <Enter>
3. From the prompt, type:
\TOOLS\REDBL drive: <Enter>
where "drive" is the letter of the uncompressed drive
for Stacker drive C (this was determined in Step 4 of
the preceding procedure).
4. Remove the floppy disk from its drive and restart your
computer.
If you didn't create a Stacker Startup Disk when you ran
Stacker Setup
First you have to create an MS-DOS 6 Startup Disk:
1. Insert your MS-DOS 6 Setup Disk 1 into drive A or B
2. Change to the floppy disk drive by typing:
A: or B: <Enter>
_______________________________________________________________
Copyright 1993, Stac Electronics Page 2 of 3
3. From the prompt, type:
SETUP /F <Enter>
4. Follow the instructions on your screen.
After you have created your MS-DOS 6 Startup Disk, follow the
procedures in the previous section, "If your system won't
start or Stacker won't load."
Your system still won't boot
If you followed the procedures detailed above and your system
still won't boot, you may have a hardware error, such as a
failing hard drive controller; a failing hard drive
controller cable; a failing sector on the hard drive, or a
failing system board. Contact your system's manufacturer for
more information.
_______________________________________________________________
Copyright 1993, Stac Electronics Page 3 of 3