The tguess command can be used to guess the number of floppy disks needed for a backup before making it. Here is a sample transcript:
#tguess
^^^^^^
Available choose methods:
1 one -- one user specified file or directory and below
2 set -- back up a directory set
Enter method name or number ---> [set] set
^^^
Available directory sets:
1 ext # extended filesystem.
2 mystuff # my stuff in the /root directory.
3 system # root filesystem, without /root dir.
Enter set name or number ---> mystuff
^^^^^^^
The last full backup of mystuff was made on Sun Dec 19 11:42:33 1993,
that was approx. 11 days ago.
Choose a backup level.
f = full backup of all files
if = incremental backup of all files changed since last full backup
---> [f] f
^
A guess index file can be useful for testing if a newly made directory
set really contains the intended files.
Make a guess index file ---> (y/n) [n] n
^
[Creating guess progress window]
Guess in progress...
Files and directories in archive: 2013
Data in archive: 23239454 bytes = 22694.78 Kb = 22.16 Mb.
Guess of floppy disks needed:
compression factor
none 70% 50% 30%
5.25" d (360Kb): 70 49 35 22
5.25" h (1.20Mb): 21 15 11 7
3.5" d (720Kb): 35 24 18 11
3.5" xd (820Kb): 30 21 16 10
3.5" h (1.44Mb): 17 12 9 6
3.5" xh (1.72Mb): 15 10 8 5
Cleaning up...
Guess completed.
#
The mystuff
directory set contains mostly text files, which compress
to about 30% of the original size. In the table, we can see that
about 10 720K floppy disks are needed for a full backup of this set.
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