SCAN and C-Scan Disk Scheduling Algorithm with solved example|Operating System

#Scan Algorithm
It is also called as Elevator Algorithm. In this algorithm, the disk arm moves into a particular direction till the end, satisfying all the requests coming in its path,and then it turns backand moves in the reverse direction satisfying requests coming in its path.

#C-SCAN algorithm
In C-SCAN algorithm, the arm of the disk moves in a particular direction servicing requests until it reaches the last cylinder, then it jumps to the last cylinder of the opposite direction without servicing any request then it turns back and start moving in that direction servicing the remaining requests.
It works in the way an elevator works, elevator moves in a direction completely till the last floor of that direction and then turns back.