How does it work?
The purpose of Disk optimization is to optimize the time it takes
to read and write files to/from the disk by minimizing head travel
time and maximizing the transfer rate. The used techniques
include:
1. Move all the index or directory information to one spot. Move
this spot into the center of the data, e.g. one third of the way
in, so that head travel to data is halved compared to having
directory information at the front.
2. Cluster files around the directory area.
3. Move infrequently used files further from the directory
area.
4. Obey a user provided table of file descriptions to emphasize or
ignore.
5. Make files contigious so that they can be read without
unnecessary seeking (defragmentation).
