Disk Physical Characteristics
• From a component perspective, all disk
drives are basically the same. A disk
platter, usually comprising an aluminum
or glass substrate material that is
sputter-coated with a magnetically
corrosive media (chromium, ruthenium,
etc.), provides a precision surface area
in which discrete data bits can be
written into a series of tracks.
Extract taken from “Disk Drives Walk the Same Walk - Jon William Toigo”
This highlights the fact that all disk drives are very similar in the production
and make up of the physical drive.
The differentiators will be in the Drive Capacity, Rotation Time, I/O Interface,
All of these features will be covered over the next few pages.