BACKUP + Backing Up Files between Drives
Backs up files from one disk to another disk in another
drive, usually from a hard disk to a floppy disk.
PC-DOS 2.0+ (revised in 3.3)
MS-DOS equivalent: BACKUP (2.0+)
[d:][path] BACKUP sd:[spath]sfilename td:[M][/A]
[d:][path] Specifies the drive letter and
path that contain the BACKUP
sd: Specifies the drive letter of
the drive that contains the
file you wish to back up
[spath]sfilename Specifies the names of the
file or files you wish to back
td: Specifies the drive letter of
the drive that will contain
the files that you wish to
back up (target).
/S Backs up all files in all
/M Backs up only those files that
have been created or altered
since the last backup.
/A Adds files to the disk in the
designated drive without
overwriting any files that may
already be on the disk.
/D:mm-dd-yy Backs up only those files that
have been altered on or after
the date specified.
/T:hh:mm:ss Backs up files that have been
altered on or after the
specified time on the date
used in option D.
/F Formats the target disk if it
has not been formatted.
/L Creates a log file in which
the first record contains the
backup date and time, and
subsequent records contain the
disk number of each backed-up
file as well as its full path
[ld:][lpath]lfilename Specifies the log file. The
default log file is
BACKUP.LOG, which is stored in
the root directory (DOS 3.3
BACKUP C:*.* A:/S
backs up all the files on drive C, including those in
subdirectories, to the disk in drive A.
BACKUP C:*.* A:M
backs up only those files that have been modified since the last
BACKUP C:pathname A:/A
appends the backed-up files from the specified directory to the
files that are on the disk in drive A without overwriting them.
BACKUP C:*.* A:D:12-15-87
backs up all the files on drive C that were created or modified
later than 12-15-87 to a disk in drive A.
BACKUP C: A:/F
formats the disk in drive A before backing up files.
BACKUP C:\ B:L
backs up all files on drive C to a disk in drive B while creating
a BACKUP.LOG file in the drive C root directory.
*** Backing up files to diskette xx ***
The backup procedure is in progress.
Cannot execute FORMAT
DOS cannot find FORMAT in the current directory or path, or there
is insufficient memory to load FORMAT. Press Ctrl-C to abort the
backup. Then insert a formatted disk and reissue the BACKUP
Cannot FORMAT nonremovable drive x
You specified the /F option but the target disk is a hard disk or
Diskette is not a backup diskette
The diskette that is being used for backup with the /A option was
not created by using the BACKUP command. Issue the BACKUP command
without the /A option, which overwrites the floppy disk, or
insert the correct disk in the drive and reissue the BACKUP
command with the /A option again.
Error opening log file
You specified the /L option, but an error such as an invalid
drive or path or a file-sharing conflict occurred. Check to see
that the drive and path you specified for the log file are valid.
The log file must not be on the target disk.
Insert backup diskette nn in drive x;
Warning! Diskette files will be erased
Strike any key when ready
Insert the next backup disk in the correct drive; then press any
key to continue backing up files.
Insert last backup diskette in drive x
You are using the /A option. Insert the last backup target disk
Invalid drive specification
Source and Target drives are the same
You cannot specify the same drive as both the source and the
*** Last file not backed up ***
The target disk was filled and there was no room for the last
Logging to file x
DOS is creating a log file as you specified.
No source drive specified
You did not specify a source drive. Issue the command again with
both source and target drives.
*** Not able to back up file ***
A file-sharing conflict exists, and files cannot be backed up.
Reissue the request with the /M option. You may have attempted to
back up a file to which you do not have access.
Target cannot be used for BACKUP
If the target is a floppy disk, remove it and insert another. If
it is not a floppy disk, restart the system and try again.
Warning! No files were found to back up
DOS could not find any files that matched the specifications of
the BACKUP command that was issued.
Warning! Files in the target drive
d:BACKUP directory will be erased
Strike any key when ready
Press Ctrl-Break if you do not want to proceed; otherwise, press
any key to proceed.
Use the RESTORE command to copy backed-up files onto the
Backed-up files cannot be used as normal files. If files
used in a backup fill one disk, you will be prompted to insert
another. You will need to have a supply of formatted disks on
hand. Be sure to label the disks in proper sequence so that they
can be restored in order. To restore backed-up files to the hard
disk, use the RESTORE command. Wildcards may be used with the
BACKUP command. Do not use BACKUP with the ASSIGN, APPEND, or
JOIN command. You may also back up files by using the DISKCOPY or
PC-DOS 3.3 contains a revised BACKUP command that stores
files more efficiently than previous versions by creating special
files that contain information about the backed-up files and
their locations, and by concatenating them into a single backup
file per disk. In version 3.3 of PC-DOS, you can also back up
files that have been altered on or after a specific time, and
format the target disk while backing up.
[For related topics, press R]
|file: /Techref/dos/command/backup.htm, 7KB, , updated: 1999/2/20 10:24, local time: 2017/12/16 11:35,
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