BACKUP Backup/Restore files or random access devices
SYNTAX
BACKUP[/OPTION] dev:[filnam.typ] dev:[filnam.typ]
SEMANTICS
The BACKUP command transfers files or volume images to or
from multi-volume backup 'savesets'. The Backup Utility
Program (BUP), is useful for making quick archive copies
of RT-11 files and device volumes, and employs various data
verification techniques to ensure data integrity.
BACKUP can also display a directory showing the contents of
device volumes and savesets that it produces.
BACKUP inp:files out:[ssname]
saves file(s) to a saveset on output volume(s)
BACKUP/DEVICE inp: out:[ssname]
saves a device image to a saveset on output volume(s)
BACKUP/RESTORE inp:[ssname/SAVESET,]files out:
restores file(s) from a device image saveset on inp:
BACKUP/RESTORE/FILE inp:ssname[/SAVESET] out:[filnam.ext]
restores saveset to one file on out:
BACKUP/RESTORE/DEVICE inp:ssname out:
restores a device from a device image saveset on inp:
BACKUP/RESTORE/DEVICE/FILE inp:[ssname/SAVESET,]files out:
restores file(s) from a device image saveset on inp:
BACKUP/DIRECTORY inp:[ssname]
creates a listing of saveset sections on the input volume
BACKUP/DIRECTORY inp:[ssname]/SAVESET[,files]
creates a listing of files within a saveset
BACKUP inp:files out:logdsk/SUBSET
creates a logical disk file (logdsk.DSK) and saves
the specified input file(s) inside it
BACKUP/RESTORE inp:logdsk/SUBSET[,files] out:
retrieves file(s) from a logical disk file
BACKUP/DIRECTORY inp:logdsk/SUBSET[,files]
creates a listing of files in a logical disk file
OPTIONS
DEVICE
BACKUP or RESTORE an entire device image. When used with /RESTORE
the output volume is initialized
DIRECTORY
Creates a backup directory listing. The listing is displayed on
your terminal, unless /OUTPUT or /PRINTER is specified.
FILE
Use only with /RESTORE. BACKUP/RESTORE/FILE restores an entire
backup saveset to exactly one disk file. BACKUP/RESTORE/DEVICE/FILE
restores one or more files from a BACKUP saveset. It is equivalent
to BACKUP/RESTORE.
INITIALIZE
Use with backup operation to initialize an output volume
LOG
Informs of beginning of backup, restore, or verify operation.
Also displays names of files processed. (default)
NOLOG
Prevents log messages from being printed on the screen
NOQUERY
Inhibits most confirmation (Are you sure?) prompts. Allows
using BACKUP from indirect command files.
NOREWIND
Prevents initial rewind of magtape before backup or restore
operation. Valid with magtape only.
NOSCAN
Omits bad-block scan of output disks during backup operations
ONLY:n
Limits the number of saveset sections to be displayed during
a /DIRECTORY operation on magtape
OUTPUT:filspc
Use with /DIRECTORY to send output to a file or device
PRINTER
Use with /DIRECTORY to send output to LP:
QUERY
Asks for confirmation before performing an operation (default)
RESTORE
Restores previously backed up files or volume created by
the BACKUP Utility
REWIND
Causes rewind of tape backup volume before operation begins
(default)
SAVESET
Designates a backup saveset for a /RESTORE or /DIRECTORY
operation. The default saveset on disk backups is BACKUP.BUP.
The default saveset on magtapes is the first saveset on the
tape. When /SAVESET is specified with /DIRECTORY, a list of
files contained within the saveset is produced.
SCAN
Performs scan for bad blocks of each output disk volume before
backup (default)
SUBSET
Use this switch in place of /SAVESET to indicate that the backup
is an RT-11 logical disk file. Not valid with magtape.
SYSTEM
Permits wildcard restore of .SYS files to the SY: device
VERIFY[:ONLY]
Provides verification of data transferred to or from a device.
BACKUP/RESTORE/VERIFY:ONLY performs a comparison of the contents
of a backup saveset with an original disk volume without actually
restoring it.
EXAMPLES
BACKUP/DEVICE/INITIALIZE/NOSCAN/VERIFY SY: DU2:
BACKUP/INITIALIZE/VERIFY/NOQUERY DU0:*.* MU0:JUL10A
BACKUP/NOREWIND/VERIFY/NOQUERY DU1:*.* MU0:JUL10B
BACKUP/DIRECTORY MU0:
BACKUP/DIRECTORY/PRINTER MU0:JUL10A/SAVESET
BACKUP/RESTORE MU0:JUL10A/SAVESET,*.FOR DU2:
BACKUP/RESTORE/FILE MU0:JUL10A.BUP SY:JUL10A.DSK
BACKUP/VERIFY *.FOR,*.MAC,*.SAV SY:STUFF.DSK/SUBSET
BACKUP/DIRECTORY SY:STUFF.DSK/SUBSET
Tim Shoppa
7328 Bradley Blvd
Bethesda, MD 20817
Voice:+1 301 767 5917
Fax:+1 301 767 5927
Email:shoppa@trailing-edge.com