BACKUP (MS-DOS)
From Just Solve the File Format Problem
(Difference between revisions)
Dan Tobias (Talk | contribs) |
|||
| Line 1: | Line 1: | ||
{{FormatInfo | {{FormatInfo | ||
| − | |subcat= | + | |subcat=Backup |
|extensions={{ext|@@@}}, others | |extensions={{ext|@@@}}, others | ||
}} | }} | ||
| Line 13: | Line 13: | ||
[[Category:Microsoft]] | [[Category:Microsoft]] | ||
[[Category:File formats with too many extensions]] | [[Category:File formats with too many extensions]] | ||
| + | [[Category:Archiving]] | ||
Revision as of 02:13, 18 February 2017
The BACKUP command in MS-DOS backed up the contents of a hard disk to files of a proprietary, undocumented format which could be returned to their original file structure using the RESTORE command. A number of different formats have been used in different versions of DOS. Files generally had extensions consisting of three digits (incremented consecutively across the files of the backup set), with a control file called BACKUPID.@@@. The aim was to store the entire file and directory structure of a disk onto a set of files that each fit on a floppy disk.
The developers of FreeDOS have attempted to reverse-engineer these formats to produce backup and restore commands in that system that are compatible with Microsoft's.
