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STACKER NOTE                                                   STACKER NOTE
Title: Stacker and Anti-Virus Programs
STAC FAX Index #2403 - 6/22/92                          
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Background.

   Stacker is compatible with anti-virus programs such as those from Norton 
   (NAV) and Central Point (CPAV).  However, in order for them to peacefully 
   coexist, there are a few guidelines to follow.

Installing Stacker.

   Before installing Stacker, disable any TSRs and Anti-Virus programs that 
   are memory resident.  Device drivers such as NAV&.SYS, NAV_.SYS, and 
   VWATCH.SYS should be disabled by REMarking the drivers in Config.sys 
   and rebooting.  
   
   NOTE: Failure to disable these could result in an incomplete 
         installation. 

Configuring Device Drivers.

   It is generally recommended that any anti-virus devices be loaded AFTER 
   the Stacker device driver in Config.sys.  Loading devices such as 
   NAV_.SYS before Stacker may cause the system to hang while loading the 
   Stacker device driver.  

Immunization.   

   CPAV allows you to "immunize" executable files by adding signature 
   information to the file. Do NOT immunize the Stacker device driver files.  
   These files use their own signature information for a "CheckSum" self- 
   check at boot time. Immunizing the files disrupts this checksum 
   information and prevents them from loading.  Exempt the files from 
   immunization by adding them to the immunization exception list.  Add the 
   following files: 
   
   STACKER.COM 
   SSWAP.COM, 
   STACKER.XT 
   STACKER.AT 
   STACKER.MC  
   
   If these files have been immunized accidently, restore them from the 
   Stacker diskette or remove the immunization from the files.

BOOTSAFE from Central Point Anti-Virus.

   Bootsafe is Central Point's partition table and boot sector security 
   system. Usually loaded in Autoexec.bat, it examines the boot sector and 
   partition information of the default drive (usually C:).  If Stacker is 
   swapping drive letters, Bootsafe will attempt to read this information 
   on the Stacker logical drive and report: "WARNING partition/boot sector 
   has been modified!"   This solution is simply to make Bootsafe look at 
   the physical boot partition.  The syntax is:     BOOTSAFE d: 
   (where d: is the letter of the SSwapped boot drive.)  For example, to
   determine the physical boot drive, use the Stacker command.  Type

   C:\STACKER\STACKER
   
   The Drive Map display will be similar to the following:

   STACKER - Stac Electronics, Carlsbad, CA
   
   Drive C: was drive D: at boot time  [ D:\STACVOL.DSK = XX.X MB ]
   Drive D: was drive C: at boot time  

   The physical boot drive (D: in this case) is the drive that "was drive 
   C: at boot time".
    
   Therefore, in Autoexec.bat the Bootsafe line would be:

   Bootsafe D:

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Copyright 1993, Stac Electronics