I bought this book to better understand the fundamentals of the Hard Drive itself and not software and Operating Systems. I found this book to have a logical topic progression and a sweeping review of Hard Drive fundamentals. It delivered what I needed in an effective manner with plenty of tables and diagrams to aid understanding.

Another review of this book stated it was lacking on discussing some aspects, like the physics of magnetism, but my intention was simply to garner a better understanding of the mechanical/electrical parts of a Hard Drive. There are plenty enough math ideas to ponder for me, but perhaps if one is an Engineering Student you might enjoy additional formulas and deeper physics. However, especially for those of us who simply want a more concrete understanding of what happens inside the Hard Disk, this book is very useful.

The only negative I found was the sometimes odd phrasing, but the book repeats the main points in numerous ways to make itself understandable even for those of us who are 'layman'.

I would have given 5 stars and not 4 if it was offered at a lower price.