Incremental backups to a local tape drive

Level-1 backup

The following command performs a level-1 backup of the /vol/vol1 volume to nrst0a. This means that only files that have changed since the most recent level-0 backup of the same path are written to tape. After the command is finished, it does not rewind the tape.

dump 1uf nrst0a /vol/vol1

The elements of this command line are described in the following table.

Element	Meaning
`1`	Do a level-1 backup.
`u`	Record the backup in the /etc/dumpdates file.
`f`	A tape device is supplied in the command line.
`nrst0a`	The tape drive does not rewind.
`/vol/vol1`	This is the volume to be backed up.