Computer Science - Computer Fundamentals - Discussion

6. 

The tracks on a disk which can be accessed without repositioning the R/W heads is

[A]. Surface
[B]. Cylinder
[C]. Cluster
[D]. All of the above
[E]. None of the above

Answer: Option B

Explanation:

No answer description available for this question.

Shaswati said: (Mar 16, 2011)  
I could not understand this. Please explain.

Laxmi said: (Jun 16, 2011)  
What is R/W?

Suresh said: (Jun 16, 2011)  
R/W is Read/Write.

Jeyam said: (Nov 1, 2011)  
Tell the reason any one.

Rathika.B said: (Jan 15, 2012)  
I know only, the cylinder is nothing but group of disks. So, these group of disks (cylinder) can't help to provide the movement of read/write head.

Sundar said: (Mar 7, 2012)  
Track (track number N) from all discs (vertically) forms a cylinder.

Since cylinder is rotating we no need to move the R/W head to access the data.

Victor said: (Mar 13, 2012)  
Does it really mean that the entire platter is the cylinder?

Deepu said: (Aug 20, 2012)  
Cluster is wright answer.

Kaustubh said: (Nov 27, 2012)  
Cylinders are vertically formed by tracks. In other words, track 12 on platter 0 plus track 12 on platter 1 etc. is cylinder 12. The number of cylinders of a disk drive exactly equals the number of tracks on a single surface in the drive.

So, in order to access a particular cylinder from a track we do not need to move R/W head from that particular track.

Kk Tiwari said: (Jan 12, 2013)  
Because the total no of cylinders in a disk exactly equals the number of tracks on a single surface in the drive.

Suryakant said: (Mar 10, 2013)  
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.

Porkodi said: (Aug 7, 2013)  
Cylinder is one of the size method of disk.

Vishal Thorat said: (Aug 8, 2013)  
R/W is Read/Write.

Vanlalruata Hnamte said: (Jan 25, 2014)  
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. :-).

Archana said: (Feb 8, 2014)  
Cylinder is a process method which can provides the current or previous transmission.

Ankita said: (Jun 24, 2014)  
Please explain the terms-surface, cluster & cylinder on disc.

Jins Nalleparampam said: (Nov 26, 2014)  
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.

Bhanuprakash.Sphhorthyengg said: (Jan 9, 2015)  
My dear friends each cylinder is having R/W head.

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

Smruti Ranjan Swain said: (Feb 8, 2015)  
What is R/W?

Pushpa said: (May 17, 2015)  
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.

Akshay K said: (Jun 3, 2015)  
How we can find the 1's complement?

Ehsan Tareen said: (Jun 6, 2015)  
What is the definition of cylinder?

V.Viswanath Sai Vara Pra Sad Reddy said: (Jun 8, 2015)  
Cylinder is nothing but a group of disk, it is rotating we need to do rewrite access the data r/w means rewrite.

Samuel said: (Nov 24, 2016)  
Track - Circular portion that passes under read and writes head as the disk rotates.

Sectors - Each track is divided into sectors with fixed number of bytes.

Cluster - Fixed number of sectors treated as one unit for storage by the operating system.

Cylinder- recording of data vertically reduces access arm movement.

Sowmya said: (Jan 31, 2017)  
Set of tracks (group of disks) that can be read without repositioning of r/w heads. So the correct answer is the cylinder.

Prakash said: (Jun 15, 2018)  
The technology is used in a magnetic disk, where the read and write operation function on track and the tracks is the collection of multiple segments where the data are stored.

Loaraju said: (Jul 17, 2018)  
What is R/W?

Vidhu said: (Sep 12, 2018)  
R/W means Read/Write.

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