Computer Science - Computer Fundamentals - Discussion

Tracks are concentric circles divided on the surface of plate of hard disk. As there are more than one plate in hard disk. This circles and plates looks like cylinder. Here I can't so diagrammatically but understand me. It is other name for tracks.

About cluster it is term that defines allocation of memory in file system. Fs like ntfs produces clusters during formatting and its size is defined during formatting.

Cylinder is one of the size method of disk.

R/W is Read/Write.

Cluster & Surface are scatter. The R/W head has to move forward and backward. So from this, All of the Above option is wrong.

Cylinder is the Plate itself. So the R/W head always touch it. :-).

Cylinder is a process method which can provides the current or previous transmission.

Please explain the terms-surface, cluster & cylinder on disc.

I think this question and answer is wrong. R/W head should be re-positioned to access the cylinder. What Mr.Sundar said is correct "Track (track number N) from all discs (vertically) forms a cylinder". There is only one r/w head for each disk surface. So to access each cylinder (tracks on each disk) head should move.

This question should be "The part on a disk which can be accessed without re-positioning the R/W heads is" and the answer is SURFACE.

My dear friends each cylinder is having R/W head.

Please refer: http://en.wikipedia.org/wiki/Cylinder-head-sector#Cylinders.

What is R/W?

Cylinder is the right answer.

Tracks and Cylinders. The idea of a cylinder is an artifact of the mechanical nature of the actuators used to move the read/write heads on a modern disk. It is faster to read sectors from the same track than it is to move to another track, even one close by. We now consider the fact that standard disk drives with concentric tracks and multiple recording surfaces have the same number of tracks and track geometry on each of the surfaces.

When the actuator is functioning properly, as it almost always is, each read/write head is over (or near to) the same numbered track on its disk. This leads to the idea of a cylinder as the set of tracks that can be read without significant repositioning of the read/write heads. In early disk designs, with wider tracks, there would be no positioning required to move from surface to surface on a cylinder. All that would be required was an electronic switching of the active head, a matter of nanoseconds and not milliseconds.