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- BACKUP should not be run when an APPEND path is defined. Turn APPEND off
- (APPEND ;) first. Don't use BACKUP on ASSIGNed, JOINed, or SUBSTed drive
- letters.
-
- The XCOPY command is an alternative way to backup files. It has some
- limitations, but is frequently faster than the BACKUP command.
-
- Unlike COPY and XCOPY, BACKUP does not have a /V option. Execute the VERIFY
- command to turn VERIFY ON before doing a backup if there is any question about
- the reliability of the destination diskettes. See the NEW_TERMS VERIFY topic
- for more information.
-
- You should have PLENTY of formatted diskettes before beginning a BACKUP
- command. Remember that each Megabyte (million characters) of data to be
- backed up requires one high-capacity diskette, or two (or more) double-
- sided diskettes.
-
- Using BACKUP and RESTORE is a way to copy a large file (greater than the size
- of a single diskette) from one computer to another.
-
- BACKUP with one level of DOS will not necessarily create diskettes that
- RESTORE for another level of DOS can read. Use caution when changing levels
- of DOS. Run a few compatibility tests first. DOS 3.3 on most systems is a
- lot different than preceding levels of BACKUP.
-
- BACKUP can handle lots of subdirectories and duplicate names (a file in two
- different directories with the same name). Older versions of BACKUP do this
- by creating unique extensions of the form .@nn on the destination diskettes,
- where nn is a sequential number starting at 01 assigned to each file on the
- backup diskette which has the same name as a file already backed up. Beginning
- with DOS 3.3, a single BACKUP.001 file holds all the backed up files, and a
- file called CONTROL.001 keeps track of their path names.
-
- Some versions of BACKUP may backup your system (hidden) files. If the RESTORE
- that later reads the files restores them to the wrong place on the disk, you
- may not be able to boot your computer.