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      STACKER NOTE                                         STACKER NOTE
                  TOO FRAGMENTED, NOT MOUNTED AFTER UPGRADE
                          (Applies to Stacker 4.0)
      STAC FAX  4703 (03-09-1994)
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      BACKGROUND
      
      Each Stacker drive is actually a STACVOL.xxx file that is stored
      on the uncompressed drive. The Stacker device driver requires
      this file be almost contiguous, containing little fragmentation.
      When you upgrade to Stacker 4.0, portions of the STACVOL file
      will grow, and hidden files on the drive may result in excessive
      fragmentation. The situation may result in the error message that
      the STACVOL file is too fragmented, and that it is not mounted.
      It may also cause your system to "hang" at the time that the
      Stacker device driver loads.
      
      SOLUTION
      
         - Restart your system.
         - Check your disk for errors.
         - Unhide the files on the uncompressed drive.
         - Defragment the drive.
           
      Restart your system
      
      Restart your system so that a DOS prompt is available. If your
      system is hanging at the Stacker device driver you may bypass
      loading the driver. When you reboot your system press the Ctrl-
      Alt-Shift key combination immediately after the machine "beeps".
      Continue holding the keys down until you get the message "Press
      Escape to cancel installation...". Release the keys and press
      <Esc> then <Enter> to continue. Your machine will start without
      loading Stacker.
      
      Check your disk for errors
      
      In this example we will assume that the C drive is the drive
      receiving the error message.
      
       1.  Run CHKDSK to check your disk for errors. CHKDSK should
           exist on the DOS directory of your C drive. Note that if you
           are using MS-DOS 6, CHKDSK is also on Setup disk # 1. From
           the location where CHKDSK is, type:
           CHKDSK C: <enter>
       2.  If you find errors, type:
           CHKDSK C: /F <enter>
          Allow CHKDSK to make needed repairs.
           
      Unhide the files on the uncompressed drive
      
       1.  Determine which files on your drive are hidden. From the
           root directory of your C drive type: DIR /AH <enter>. This
           will display the hidden files. If your version of DOS does
           not support this command, you may need another
           manufacturer's utility to view the files.
       2.  Unhide all the files and subdirectories you find except
           MSDOS.SYS and IO.SYS. You may use the DOS ATTRIB command,
           Stacker's SATTRIB command, or a third party utility to
           unhide the files. If you are using MS-DOS 6, note that its
           ATTRIB command is on Setup disk # 1. To use Stacker's
           SATTRIB command you would put stacker disk # 2 into the
           floppy drive, go to that drive and type:
           SATTRIB -S -H -R C:\(PATH)(FILENAME)
           For example:
           SATTRIB -S -H -R C:\STACKER2.BIN
           Do this for each hidden file or directory.
       3.  Do not restart your computer. Some files may be rehidden by
           the boot process.
           
      Defragment the drive
      
       1.  Use a utility to defragment your disk. Programs such as
           Norton Utilities' Speedisk or PC Tools' Compress or MS-DOS's
           DEFRAG are examples of these utilities.
       2.  Since your Stacker drive is not mounted, you will not have
           access to your utilities on that drive. Use the "emergency"
           disks provided by the utility to run the defragmenter from
           the floppy drive. Note that if you are using MS-DOS 6, the
           DEFRAG utility is on Setup disk #1. See the manufacturer's
           instructions for details on running the defragmenter.
       3.  Restart your computer. Your Stacker drive should mount
           normally.
           
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      Copyright 1994 Stac Electronics