
                          FYI

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          TITLE: SuperStor 2.0 and DR DOS Compatibility
   DOCUMENT ID#: FYI-M-1621
           DATE: 08SEPT92
        PRODUCT: DR DOS
PRODUCT VERSION: 6.0
     SUPERSEDES

SUPERSTOR 2.0 

All revisions of SuperStor 2.0 are known to be compatible with DR
DOS 5.0 and DR DOS 6.0 operating systems.  A sound knowledge base
of both DR DOS and SuperStor 2.0 is recommended before attempting
any of the below tips.  Please call Addstor, Inc. at 415-688-0465
for additional information regarding SuperStor 2.0 specific
problems. 

UPGRADING FROM MS-DOS 4 OR 5 TO DR DOS 6

Scenario #1: Entire C: drive is compressed and does not swap with
another drive. Copy the DOS file ATTRIB.EXE to a plain bootable
system floppy.  Put this floppy in the A: drive and reboot the
system.  Use the ATTRIB command to remove the (S)ystem and (H)idden
attributes from the file SSPARTSS.ADD on the C: drive.

This command would be: ATTRIB -S -H SSPARTSS.ADD

Rename this file to SSPARTSS.SWP.  Reassign the (S)ystem and
(H)idden attributes to the file SSPARTSS.SWP on the C: drive.

This command would be: ATTRIB +S +H SSPARTSS.SWP

Reboot the system from the DR DOS Install disk.  DR DOS should load
and swap the SuperStor drive.  Install DR DOS normally.  DO NOT
REBOOT FROM THE HARD DISK UPON COMPLETION OF THE DR DOS INSTALL. 
Once again, boot from the bootable system floppy which was made
earlier.  Copy the files SSTORDRV.SYS and DEVSWAP.COM from the
SuperStor 2.0 Program Disk to the root directory of the C: drive. 
Remove the floppy from the A: drive.  Reboot the system.  Your
upgrade is complete.

NOTE: it is possible to return to a non-swap configuration with
SuperStor.  This may be done by simply removing the (S)ystem and
(H)idden attributes from the file SSPARTSS.SWP on the swapped
uncompressed partition.

This command would be: ATTRIB -S -H SSPARTSS.SWP

Then, rename the file SSPARTSS.SWP to SSPARTSS.ADD.  Reassign the
(S)ystem and (H)idden attributes to the file SSPARTSS.ADD on the
swapped uncompressed partition.  Reboot the system.  The SuperStor
drive should no longer swap with an uncompressed partition.

NOTE: Items in AUTOEXEC.BAT and CONFIG.SYS, such as DISKMAP, may
still be referencing the swap drive.  Updates should be made to
AUTOEXEC.BAT and CONFIG.SYS to delete any references to the
previously created swap drive.
 
Scenario #2: C: drive is uncompressed or swaps with another drive.

Boot from the DR DOS install disk.  Install DR DOS normally.  After
installing DR DOS, format a plain DR DOS system floppy in your A:
drive.  Reboot the system with the system disk in the A: drive. 
Copy the files SSTORDRV.SYS and DEVSWAP.COM form your SuperStor
program disk to the root directory of the C: drive.  Remove the
floppy from the A: drive.  Reboot the system.  Your upgrade is
complete.

RECOMMENDED METHOD FOR SUCCESSFUL COMPRESSIONS (hard disk)

1. Create a plain DR DOS system floppy.  

NOTE: this may be done by formatting a disk in the A: drive with
the FORMAT A: /S command.  Or one may use FORMAT A: to format a
disk in the A: drive and SYS A: to transfer the system files to the
diskette.          

2. Create a CONFIG.SYS on this DR DOS system floppy.  This
CONFIG.SYS should include:

   FILES=20 
   BUFFERS=20  
   DEVICE=\SSTORDRV.SYS
   DEVICE=\DEVSWAP.COM
  
3. Create a AUTOEXEC.BAT on this DR DOS system floppy.  This
AUTOEXEC.BAT should include:

   PATH=A:\;C:\;C:\ADDSTOR    
   PROMPT $P$G

   NOTE: the subdirectory on your C: drive where SuperStor 2.0 is
kept may have a name other than "ADDSTOR".

4. Boot from this DR DOS system floppy.  

5. From the A: prompt, run the SSTOR.EXE floppy and continue with
the SuperStor 2.0 instructions for compressing a hard disk. 

NOTE: this procedure is recommended as no TSRs or device drivers
will be allowed to interfere with the compression process.

DISKOPT AND SUPERSTOR 2.0

It is NOT recommended that DR DOS 6.0's DISKOPT be used on a
SuperStor 2.0 disk drive.  DR DOS 6.0's DISKOPT has not been
verified with SuperStor 2.0, and therefore may cause undeterminable
results.  AddStor supplies their own disk optimization utility with
SuperStor 2.0 which MAY be used to optimize the SuperStor 2.0
compressed drive.

RECOMPRESS

SuperStor 2.0 contains an advanced compression utility called
Recompress which "improves the data compression of a SuperStor Disk
by up to 25%."  The use of Recompress, on a drive created with DR
DOS's release of SuperStor, is NOT recommended.  There are known
problems between SuperStor 2.x's Recompress and DR DOS's release of
SuperStor. Addstor is aware of the situation and is working on a
solution.
