Microsoft KB Archive/113775

= MS-DOS 6.21: Errors Restoring Compressed Backups =

Article ID: 113775

Article Last Modified on 11/20/1999

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APPLIES TO


 * Microsoft MS-DOS 6.21 Standard Edition

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This article was previously published under Q113775



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 from disk #1 in drive A.

-or-

Alert

Compression failure within.

MS-DOS 6.21 Backup for Windows
The compression header for the catalog is corrupt. Use rebuild to reconstruct the catalog.

-or-

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

-or-

The compression header for the file 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: KB113775

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