15 Running tguess

Contents of this section

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.

Next Chapter, Previous Chapter

Table of contents of this chapter, General table of contents

Top of the document, Beginning of this Chapter