What is going on inside the hard disk in Copipe?

Even though I know the structure of the hard disk itself, of course it is not normal to disassemble the outside and open it openly and watchfully. There is also the danger of being broken ....

But here, the strong man who accomplishes that recklessly and releases what is going on in the hard disk appears in the movie. When power on, delete, copy & paste, quick format etc is executed, what is going on inside a hard disk? What is the identity of the usual sound that you call "crisp and crispy"?

The replay of all the movies will be revealed from the following.
YouTube - Inside of Hard Drive

It moves quite violently. It is easy to understand that moving around during operation is somewhat alright.

Also, a practical movie of the incorrect hard disk repair method.

YouTube - Hard Drive Fix

You can see well that you are rotating at a speed that you can not imagine if you are looking at it, but how much you are spinning at such a great momentum means you can better understand the following movie.

YouTube - Disk Drop

According to the following movie, it seems possible to make it a speaker by using the high speed rotation of the hard disk.

YouTube - hard drive used as speaker

Although the possibility of breakdown increases dramatically if the cover of the hard disk itself is opened, a nice hard disk which the external cover is transparent properly and the contents can be seen is on sale.

WD Raptor X: Photo

A moving movie is here.

WD Raptor X: Videos

Detailed specifications are as follows.

WD Raptor X 150 GB hard drive (WD 1500 AHFD)

The current lowest price is like this.

WD 1500 AHFD (150 G SATA 150 15000) from the lowest price 34,980 yen - [price .com]