What are the sectors, cylinder and tracks in hard drive

[Aandaleeb]

Hi every body, I am MSC computer science part student and making a project on hard disc. I want to know that how are going to save in hard disc and what are the tracks, cylinders and sectors in hard drive. How can we access the data from it. Can any tell that how to access the data from hard drive. Please?

[Hardwareman]

All information of the data save on a hard disk are going to be recorded in tracks, and they are in the form of concentric circles kept on the surface of every platter, more similar as the annual rings of a tree. All the tracks have given a number, which is starts from zero, and begins from at the outside of the platter and the number are increase as you move inside. A new era hard disk having about tens of thousands of tracks on each platter.

[sid0972]

http://en.wikipedia.org/wiki/Hard_disk

i think its all u need....and it cant b xplaind better

[Maxforu]

A hard drive are generally created with of numbers of platters, every of which re uses two heads to record and read data, one on the top and other one for the bottom of platter. The heads which are access the platters and they are locked with each other on an assembly of head arms. The meaning of this is that all the heads goes in and out with each other, so each head are always physically situated at the same number of track.

[Killen]

A cylinder are commonly made with the set of each and every tracks which are all the heads are currently located at. Suppose if a disk had five platters, it will (normally) have ten heads, and number of cylinder 720 (for example) will be created with of the set of ten tracks, one per platter surface, and at the track number 720. The name which comes from the fact that if you mentally suppose all of these tracks, they will make a skeletal cylinder due to they all are of equal-sized circles kept one on one of top of the other in space.

[T.J.]

The hard disk track density refers this, unsurprisingly, to how tightly fixed all the tracks on the surface of every platter. The same track density are having by each and every platter. The higher hard disk track density, this means we can insert more information on the hard disk. The track density is one part of areal density, which is known as to the bits number which are fixed into every unit of area on the surface of the head disk.