You can specify a backup level for your dump command, based on which all files or only the most recently changed files are to be backed up to tape.
A level-0 backup is a full backup. A full backup backs up all the data in the dump path.
Backups at levels from 1 through 9 are incremental backups. An incremental backup backs up only the items in the dump path that have been created or changed since the most recent backup of a lower level.
The range is 0 through 9.
The following command performs a full backup of the /vol/vol1/users/tom/specs directory. After the dump command finishes, the tape drive rewinds the tape.
The following list describes the elements of the command line: