DOCUMENT:Q113775  20-NOV-1999  [msdos]
TITLE   :MS-DOS 6.21: Errors Restoring Compressed Backups
PRODUCT :Microsoft Disk Operating System
PROD/VER:MS-DOS:6.21
OPER/SYS:
KEYWORDS:

======================================================================
-------------------------------------------------------------------------------
The information in this article applies to:

 - Microsoft MS-DOS operating system version 6.21 
-------------------------------------------------------------------------------

SYMPTOMS
========

When you use an original equipment manufacturer (OEM) version of Microsoft
MS-DOS 6.21 Backup to restore backups created with an earlier version of
Microsoft Backup, you receive one of the following error messages:


MS-DOS 6.21 Backup (MS-DOS-Based Version)
-----------------------------------------

   Critical Error

   Cannot retrieve catalog <filename> from disk #1 in drive A.

   -or-

   Alert

   Compression failure within <filename>.

MS-DOS 6.21 Backup for Windows
------------------------------

   The compression header for the catalog is corrupt. Use rebuild to reconstruct
   the catalog.

   -or-

   The file <filename> could not be properly restored. Do you want to skip
   this file?

   -or-

   The compression header for the file <filename> is corrupt. Restore
   cannot process this file and must stop.

   -or-

   Cannot recover data from damaged diskette using error correction (ECC)

NOTE: This message is displayed when you try to retrieve or rebuild the backup
catalog.

CAUSE
=====

Compression code was removed from Microsoft Backup in MS-DOS 6.21. When you use
Microsoft Backup 6.21 to restore backups made with compression turned on, you
receive the errors noted above.

RESOLUTION
==========

If you are restoring backups made on another computer, re-create the backups
with compression turned off.

If you cannot re-create the backups, use the MS-DOS Expand utility (EXPAND.EXE)
to expand the required files (using the table below for reference) from the
original MS-DOS 6.0 or 6.2 disks.

Files Required for Microsoft Backup (MS-DOS-Based Version)
----------------------------------------------------------

   MSBACKDB.OVL
   MSBACKDR.OVL
   MSBACKFB.OVL
   MSBACKFR.OVL
   MSBACKUP.EX_    MSBACKUP.EXE
   MSBACKUP.HL_    MSBACKUP.HLP
   MSBACKUP.OVL
   MSBCONFG.HL_    MSBCONFG.HLP
   MSBCONFG.OVL

Files Required for Microsoft Backup for Windows
-----------------------------------------------

   MWBACKF.DL_     MWBACKF.DLL
   MWBACKR.DL_     MWBACKR.DLL
   MWBACKUP.EX_    MWBACKUP.EXE
   MWBACKUP.HL_    MWBACKUP.HLP
   MWGRAFIC.DL_    MWGRAFIC.DLL
   VFINTD.38_      VFINTD.386

MORE INFORMATION
================

To change the compression setting in Microsoft Backup 6.0 or 6.2:

1. Choose Backup.

2. Choose Options.

3. Clear the Compress Backup Data check box.

4. Choose OK.

Additional query words: 6.22 6.0 6.00 6.2 6.20 6.21 stop cancel restore ok yes no skip recreate

======================================================================
Keywords          :  
Technology        : kbMSDOSSearch kbMSDOS621
Version           : MS-DOS:6.21

=============================================================================

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