Skipped - Too small, no effective gain possible

This situation occurs when the file is smaller than the File System Block 
size. 

This situation is much more likely to occur on FAT File Systems rather 
than on HPFS File Systems, as the block size on a FAT file system is 
larger than that of HPFS, and it increases in size as the partition size 
increases. 

Example 1 

A file 'letter.doc' occupies 400 bytes, and this is 1 disk block in a HPFS 
partition.  Even with compression, the amount of disk blocks used cannot 
be reduced. 

Example 2 

A file 'letter1.doc' occupies 2000 bytes, and this is 1 disk block in a 
FAT partition (that is less than 120 MB in size).  Even with compression, 
the amount of disk blocks used cannot be reduced. 

In this case, a saving could be achieved if the partition used the HPFS 
File System. 

Override 

You can force compression of these files using the '/A' switch e.g. 

    zspack /a filenames