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      STACKER NOTE                                         STACKER NOTE
                         WINDOWS FOR WORKGROUPS 3.11
                 (Applies to Stacker 3.1 for Windows & DOS)
      STAC FAX  31204 (03-07-1994)
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      BACKGROUND
      
      Stacker 3.1 works with Windows for Workgroups (WFW) 3.11. WFW
      3.11 includes a new feature called 32-bit file access (32BFA),
      which uses a 32-bit cache called Vcache that resides between
      Windows and DOS. Stacker 3.1 does not support WFW 3.11's 32BFA.
      We recommend that 32BFA be disabled on systems where Stacker is
      running. Also, for Stacker 3.1, problems have been identified
      with two Stacker utilities when 32BFA is running, Stackometer and
      the Stacker File Manager extension:
      
           All Stacker (3.1) File Manager extension selections report
           "Stacker not installed."
           Stackometer reports "Error calculating fragmentation," then
           continues on when you click "OK."
       
      32BFA and Disk Compression
      
      Vcache is the only disk cache available under 32BFA. This means
      that caches such as SMARTDRV are disabled on drives where 32BFA
      is enabled. Also, Stacker 3.1 as 16-bit driver cannot support 32BFA.
      Therefore, we recommend that 32BFA be disabled and SMARTDRV (or
      other cache) be used in its place.
      
      SOLUTION
      
         - Disable 32-bit File Access.
         - Modify the disk cache to use the same Windows settings as
           32BFA would use.
           
      Disable 32-bit File Access
      
      Disabling 32-bit file access will prevent the error messages
      above.
      
       1.  In the Control Panel, double-click the 386 Enhanced icon.
       2.  Click the Virtual Memory button, then click the Change
           button.
       3.  At the bottom of the screen, note the current cache size
           listed under the 32-bit file access checkbox. You'll use
           this number later in the procedure.
       4.  Uncheck the 32-bit file access box.
       NOTE: This has nothing to do with the checkbox on the left: 32-
           bit disk access.
       5.  Follow the instructions and restart your system for the
           changes to take effect.
      
      Modify the disk cache to use the same Windows settings as 32BFA
      would use
      
      In order to change the size of your disk cache, you will need to
      modify its control line in your AUTOEXEC.BAT or CONFIG.SYS file.
      See the manufacturer's documentation for your cache for details.
      For example, SMARTDRV is usually initialized in the AUTOEXEC.BAT
      file. In order to modify SMARTDRV, do the following:
      
       1.  Disable 32BFA if this has not already been done.
       2.  At the DOS prompt type: ED C:\AUTOEXEC.BAT  <enter>. This
           starts the Stacker Editor and opens your AUTOEXEC.BAT file.
       3.  Change the SMARTDRV line. For example, it may look like
           this:
           C:\WINDOWS\SMARTDRV  /X 4096 xxxx
           Insert the number you wrote down earlier in place of the
           xxxx. This is the cache size for Windows.
       4.  Save the file and restart your computer.
           
      Please note that 32-bit disk access is not the same thing as 32-
      bit file access. Stacker 3.1 is compatible with 32-bit disk
      access.
      
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      Copyright 1994 Stac Electronics