BACKUP allows you to obtain information about save sets and
the files in a save set. You can display this information at your
terminal or send it to an output file.
Because BACKUP writes save sets in a format that only BACKUP
can interpret, a list operation is the only way to determine the
contents of a save set without restoring the save set. You can perform
a list operation in conjunction with any other BACKUP operation.
By default, a save-set listing supplies information about
files in the save set similar to the information supplied by the
DCL command DIRECTORY/DATE/SIZE, including the actual number of
blocks used for each file.
You can also perform a BACKUP list operation to list the contents
of a BACKUP journal file. BACKUP journal files, which are created
during a save operation by using the command qualifier /JOURNAL[=file-spec], contain on-disk records of BACKUP save operations
and the file specifications of the files saved during each operation.
Creating and Listing BACKUP Journal Files contains more
information about creating and listing BACKUP journal files.
To list the contents of a BACKUP save set, perform the following
actions:
Insert the media
containing the save set into the drive.
If the volume is a disk, mount the disk as described
in
Mounting a Volume (BACKUP mounts
tapes automatically).
Enter the BACKUP/LIST command in the format specified
in the HP OpenVMS System Management Utilities Reference Manual. The /REWIND qualifier rewinds the tape to the
beginning before searching for the save set. To list all the save
sets on a volume, include the asterisk wildcard character (*) with
the device specification. To list the contents of save sets does not require you to
know the names of save sets on magnetic tape. Enter the device specification
of the drive in which the tape is inserted with the BACKUP/LIST command.
BACKUP reads the next save set it encounters on the magnetic tape
and stops processing when it reaches the end of that save set. BACKUP
does not automatically rewind to the beginning-of-tape marker unless
you include the /REWIND qualifier in your command. Therefore, you
can list the next save set (if one exists) by repeating the BACKUP/LIST
command. If no more save sets exist on the tape, BACKUP issues the
following error messages:
%BACKUP-F-OPENIN, error opening MUA0:[000000].; as input
-SYSTEM-W-NOSUCHFILE, no such file
BACKUP verifies that the volume label is DLY201 and copies
the contents of the directory [PRAMS] to a save set named 2MAR1555.BCK.
The command qualifier LIST causes BACKUP to write save-set information
to the file MYBACK.DAT as the save operation proceeds.
HP OpenVMS System Manager's Manual, Volume 1:... 
Using BACKUP
