How is data stored and retrieved on a magnetic mass storage device?
For writing, current is routed through a read/write head which generates a magnetic charge at its tip. A bit area of a magnetic recording surface is placed in close proximity to the read/write head and a charge is induced in the surface material. The direction of current flow through the read/write head determines the polarity of the stored charge. For reading, a bit area of the recording surface is placed in close proximity to the read/write head. The stored charge induces current to flow through the read write/head. A switch connected to the read/write head detects the direction of current flow to interpret it as a bit value. 9. Describe the factors that contribute to a disk drives average access time. Which of these factors are improved if spin rate is increased? Which are improved if recording density is increased? Disk average access time is a combination of rotational delay, track-to-track seek time (head movement), and head-to-head switching time. Rotational delay is reduced if
