AT&T Unix Owner's Manual page 327

Maintaining the UNIX PC
Complete Backup
A complete backup copies all the files you have
created, as well as all system files installed or
created following the initial installation of the
Foundation Set. This type of backup generally requires
a large number of floppy disks, depending on the system
age and the number of applications installed. When you
select Complete Backup from the Backup menu, a message
informs you of the approximate number of floppy disks
required.
You should do a complete backup after the initial
system configuration and after every time you update
your system software. This action gives you a set of
floppy disks containing your latest system software and
many of your user files. It also establishes the
starting point for any subsequent partial backups.
Partial Backup
A partial backup copies only those files modified or
created since the last complete backup was performed.
These tend to be much smaller backups and can be
scheduled more frequently. When you select Partial
Backup from the Backup menu, a message informs you of
the approximate number of floppy disks required.
You should perform a partial backup at least every
week. This way, if you should experience a system
failure, you could restore your last complete backup
and your last partial backup, losing no more than one
week's work. It is necessary to save only the most
recent partial backup.
Back Up One User
This selection backs up all files belonging to a user
that you select. This selection could be referred to
as "backing up the Filecabinet," because it copies only
the files and folders in the Filecabinet of the
selected user. This backup selection should be done
frequently. In fact, all users should use this
selection daily to back up their own files.
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