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      STACKER NOTE                                         STACKER NOTE
               REPAIRING DAMAGED STACVOL FILES (SIZE MISMATCH)
                          (Applies to Stacker 4.x)
      STAC FAX  4702 (04-07-1994)
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      BACKGROUND
      
      This document addresses the error message Size Mismatch, Write
      Protected (on an existing Stacker drive), or the cases of an
      accidentaly deleted Stacvol file or an accidentally formatted
      host uncompressed drive. NOTE: See StacFax 4707 if you receive
      the message Size Mismatch, Write Protected on a NEW Stacker
      installation. Each Stacker drive is actually a STACVOL.xxx file
      that is stored on the uncompressed drive. This file is given the
      hidden, read-only, and system attributes in order to protect it.
      If the File Allocation Table (FAT) on the uncompressed drive is
      damaged, or if the file is accidentaly deleted or the
      uncompressed drive is formatted, you may be able to recover some
      or all of the data using REPAIR.EXE. You should recognize that
      these are dangerous conditions, and that you may lose data.
      
      SOLUTION
      
         - Restore the STACVOL file using REPAIR.EXE
         - Restore the files necessary to mount the Stacker drive.
           
      Repair the STACVOL file using REPAIR.EXE
      
      These instructions assume that the STACVOL file on drive C is the
      one that is damaged.
       1.  Do not write or copy anything to the drive.
       2.  Start your system with a boot disk that does not mount your 
	   Stacker drive. Change to the hard drive. From the root directory
	   of the damaged drive type:
           DIR /AH <enter>
           and record the exact spelling of the STACVOL file name. You
           will use this file name in step 4. If your version of DOS
           does not support the /AH switch to look for hidden files,
           use a third party utility or the ATTRIB command to view the
           STACVOL file name.
       3.  Type CHKDSK /F  C: <enter>
           If  CHKDSK finds lost allocation units, do NOT convert
           them to files.
       4.  Type:
           C:\STACKER\REPAIR /R C:\STACVOL.xxx  <enter>
       5.  Remove all diskettes from the floppy drives and restart the
           computer.
           
      Restore the files necessary to mount the Stacker drive.
      
      The procedures above may be sufficient to restore your Stacker
      Drive. You may also receive certain boot error messages if other
      necessary files were damaged along with the STACVOL file.
      
       1.  If the original problem was a formatted uncompressed drive,
           you may boot to a "Non-System Disk" error. If so, follow
           these steps. If not, proceed to step 2.
           a. Restart your computer with your Stacker Startup Disk.
           b. Type the following from the A prompt:
              SYS C: <enter>
           c. Remove the Startup Disk from drive A and restart your
              computer.
       2.  If your Stacker drive is not mounted when you restart,
           examine the root directory of your C drive for a STACKER
	   DIRECTORY. If it does not exist, then type:
           MD STACKER <enter>
       3.  If your CD-ROM drive is not accessible, install the CD-ROM 
	   software to the hard drive and restart your system to make
	   it available.
       4.  If you had to make a Stacker directory, place the Stacker CD
           in its drive, switch to the \STACKER directory on that drive,
           and type:
           COPY x:*.BIN C:\STACKER <enter>
           COPY x:STACKER.COM C:\STACKER <enter>
	   COPY x:REDBL.BAT C:\STACKER <enter>
	   COPY x:CONFIG.EXE C:\STACKER <enter>
	   COPY x:SATTRIB.EXE C:\STACKER <enter>
	   where x: is the letter of the CD-ROM drive.
           If you are using DOS 5 or earlier also type:
           COPY x:SSWAP.COM C:\STACKER <enter>
       5.  Change to the STACKER directory and type:
	   REDBL C: <enter>
           CONFIG <enter>  then answer yes to the question asked.
       6.  Restart your computer to mount the Stacker drive. If you
	   have difficulty accessing the CD-ROM drive after rebooting,
           see document 4514m.txt.
           
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      Copyright 1994 Stac Electronics
