MS-DOS 6.21: Errors Restoring Compressed Backups (113775)

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.

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