glossary:

access time: It is the total sum of seek time( time taken to position a head over a particular track), settle time (time taken for the head to stabilize) and latency time taken for the head to move to the particular sector)

cluster: one or more successive sectors that contain a contiguous group of data. It is the smallest unit in which data is stored on a drive.

cookie: the Mylar disk to which data is written in a floppy drive

read/write head: the drive component that writes data to or read data from the hard disk.

platter: a metal disk on which data is stored.