Question

The disk read service time and disk write service time are quite similar (with disk read being slightly faster). But file system read operations are usually slower than file system write operations. Why?

Answer 1

Author: Rishabh Jain

Date:10/09/2019

There is couple of reasons why file system read operations are usually slower than file system write operations.

As reading the content from the disk is not from one place,it is from any point between beginning to end.Reading is done from many points from the disk while writing the content is generally done at a particular point.Reading a content from the disk is more like reading the dictionary, in that we jump to one entry we want to know about, then we leap somewhere else.In disks this jumping around is done by disk heads , which can move in one direction.As the reading points can be present anywhere in the disk so because of the reading the disk is slower than that of writing into the disk.