Restoring Files Backed Up with MS-DOS Version Earlier than 3.3 PSS ID Number: Q31840 Article last modified on 02-10-1993 PSS database name: O_MSDOS
3.30 3.30a
MS-DOS
| The information in this article applies to: |
| - Microsoft MS-DOS operating system versions 3.x |
Summary:
The MS-DOS version 3.3 BACKUP command uses a different file format to store files that have been backed up. Because of this different format, the RESTORE command in MS-DOS 3.3 must be able to restore the new format as well as the old format.
MS-DOS 3.3 RESTORE command should be able to restore files backed up under most other versions and dialects of the BACKUP command, provided the OEM version of MS-DOS did not modify the BACKUP file format. The only version of BACKUP that creates files that cannot be restored under MS-DOS 3.3 RESTORE command are disks that were created with MS-DOS 3.2 BACKUP command. Use the MS-DOS version 3.2 RESTORE command to restore these files, or use the V32SLASH utility included with the “MS-DOS Backup/Restore Supplemental Utilities” application note before restoring the backup disks with the MS-DOS 3.3 RESTORE command. For more information about this application note, query on the following words in the Microsoft Knowledge Base:
appnote and pd0315
The following MS-DOS versions create backup disks that have been successfully restored by the MS-DOS 3.3 RESTORE command:
- MS-DOS version 3.21
- MS-DOS version 3.3
- MS-DOS version 4.0x
- MS-DOS version 5.0
- IBM PC-DOS version 2.1
- IBM PC-DOS version 3.0
- IBM PC-DOS version 3.2
- IBM PC-DOS version 3.3
- IBM PC-DOS version 4.0x
- IBM PC-DOS version 5.0
Additional reference words: 3.30 3.30a
Copyright Microsoft Corporation 1993.
