MS-DOS 6.21: Errors Restoring Compressed Backups (113775)
The information in this article applies to:
• Microsoft MS-DOS operating system 6.21
This article was previously published under Q113775
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)
Cannot retrieve catalog <filename> from disk #1 in drive A.
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.
The file <filename> could not be properly restored. Do you want to skip
The compression header for the file <filename> is corrupt. Restore
cannot process this file and must stop.
Cannot recover data from damaged diskette using error correction (ECC)
NOTE: This message is displayed when you try to retrieve or rebuild the
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.
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)
Files Required for Microsoft Backup for Windows
To change the compression setting in Microsoft Backup 6.0 or 6.2:
• Choose Backup.
• Choose Options.
• Clear the Compress Backup Data check box.
• Choose OK.
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