Backs up one or more files from one disk to another.
BACKUP source destination-drive [/A] [/D[:]mm-dd-yy [/T[:]hh:mm:ss]] [/F | /F[:size]] [/HD] [/L[:[drive][path]logfile]] [/M] [/P] [/S]
SIZE size sides density 3.5 / 5.25
160[K[B]] 160KB, single, double, 5.25
180[K[B]] 180KB, single, double, 5.25
320[K[B]] 320KB, double, double, 5.25
360[K[B]] 360KB, double, double, 5.25
720[K[B]] 720KB, double, double, 3.5
1200[K[B]]
1.2[M[B]] 1.2MB, double, quadruple, 5.25
1440[K[B]]
1.44[M[B]] 1.44MB, double, quadruple, 3.5
2880[K[B]]
2.88[M[B]] 2.88MB, double, extra-high, 3.5
20.8[M[B]] 20.8MB, floptical (mag-op), 3.5
SIZE size sides density 3.5 / 5.25
RESTORE - recover files from backups.
Files backed up using the BACKUP command are stored in a special, compacted format and are therefore not usable for normal file processing. You must use the RESTORE command to recall them and store them in the normal (un-compacted) format.
v3.30 through v5.0. stored backed up files in a different format than earlier Versions (the new backup method requires less disk space). In these Versions, the BACKUP program creates two files on the backup disk: BACKUP and CONTROL. The BACKUP file will contain all the files that were backed up and the CONTROL file will contain file storage information such as the paths and filenames of the source files.
The /A option does not work if the files on the backup disk were copied using a BACKUP program in v3.20 or earlier.
If you are backing up files from a diskette, do not write-protect them. BACKUP changes the archive attribute of each file as it is backed up.
All files in the drive C LETTERS directory that begin with SALE and with any filename extension are backed up onto the disk in drive A:
BACKUP C:\LETTERS\SALE*.* A:
BACKUP will display a prompt when it is time to insert the disks. If the /A option is not used, there will also be a warning that any files currently stored on the target disk will be erased.
BACKUP C:\*.* A: /S
Does a complete backup of all files on the hard disk (drive C:), storing the backed-up files on drive A.
BACKUP C:\DBASE\*.DBF A:
Backs up all .DBF files from a directory named C:\DBASE.
BACKUP C:\*.DAT A: /S /M /A
Backs up files in all directories (/S) with an extension of .DAT that have changed since the last time they were backed up (/M). These files are added to a previously-used backup diskette (/A).
BACKUP C:\*.* D:
Creates a directory named D:\Backup on drive D: and backs up all files on drive C: to that directory.
BACKUP C:\*.* A: /S /D:01-12-89 /T:17:00:00] /L:C:\12JAN89.BKP
Backs up files on C: created or modified after 5pm Jan 12, 1989. The file C:\12JAN89.BKP will contain a Log of the files saved.
BACKUP C:\*.* A: /F720 /A
Does a full backup to a 3.5" diskette drive A: and formats diskettes as needed. Low-cost 720K-capacity diskettes may be used.
BACKUP C:\ A: /S
Backs up all files on your hard disk starting with the root directory to the disk in drive A. The /S switch causes the operating system to back up the subdirectories in each directory. Deletes any files already on the floppy disk.
BACKUP C:*.DOC A:
Backs up files having the extension .doc from the current directory on drive C to the disk in drive A. Deletes any files already on the floppy disk.
BACKUP A:\BUDGETS B: /S
Backs up files from the budgets directory and its subdirectories on the disk in drive A to the disk in drive B. The /S switch causes the operating system to back up all subdirectories of the budgets directory. Deletes any files already on the floppy disk.
BACKUP A: C:
Backs up files from the disk in drive A to drive C. The backup files are placed in a subdirectory called backup, which the operating system creates on drive C under the root directory.