In computers, "Slack Space" is a byproduct of what? Use what in their helmets to scratch their noses?
Answer: Cluster Size
To reduce the overhead of data management, many file systems use a cluster-based approach that groups data in blocks of 512 bytes to 64 kilobytes or more.
In file systems where the average file size is very small (for example, a computer system that stores hundreds of thousands of 4-kilobyte files), and when the cluster size is set very large (for example, 64 kilobytes), it becomes a lot Space is wasted because the smallest amount of available space (64 KB) is radically larger than the size of most files on the system (4 kilobytes). The space wasted by the difference between file size and cluster size in each cluster is called white space.