For a magnetic disk with concentric circular tracks, the latency is not linearly proportional to the seek distance due to
(A) non-uniform distribution of requests
(B) arm starting and stopping inertia
(C) higher capacity of tracks on the periphery of the platter
(D) use of unfair arm scheduling policies
In magnetic disk the seek time means the amount of time required to place the read/write head in a proper track. Latency is the amount of time that elapses after the head is positioned over the correct track until the starting position of the addressed sector passes under the read/write head. The latency is not linearly proportional to the seek distance due to the higher capacity of tracks on the platter.