Tandy 1000 MS-DOS Reference Manual page 55

Chapter 6 / Command Referem;e
BACKUP External
I
Q
I
~=D~.~.~
BACKUP
[pathname] drive: [IS] [1M] [fA]
Y
I
.~.~
[/D:date]
Copies (backs up) one or more files from a hard disk to floppy
disks (diskettes). To use files that are on backup diskettes, you
must use the RESTORE command to copy them back to hard
disk. Do not try to use them otherwise.
Parameters
pathname specifies the file you want to back up.
drive: specifies the disk to receive the files.
IS causes BACKUP to copy all files in the specified directory
and all directories below it.
1M
causes BACKUP to copy only those files that have been modi-
fied since the last backup.
IA tells BACKUP to add the files (to be backed up) to the
diskette already in the specified drive, rather than prompting
you to insert a new diskette.
If you omit the
IA parameter, BACKUP asks you to insert a
diskette. Then, before backing up any hard disk files, it erases
any existing files on the diskette. When the diskette is filled,
BACKUP asks you to insert another. Be sure to label each
diskette so you know the proper order of the backups.
lD:date copies only those files created on or after the date speci-
fied (in the
mm-dd-yy
format).
Notes and Suggestions
• Loss of information stored on hard disk, although not likely,
can be disastrous-simply because of the amount of informa-
tion. Therefore, you should always keep and update floppy
diskette copies of all hard disk information.
• If you have several files to back up, you may want to create a
batch file consisting of the necessary backup commands. Then
you can do all the backups simply by running the batch file.
(See information on Batch Files in Chapter 4.)
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