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Hard Drives
Section 3.3.7
Definition of a Hard Drive
Main location where all data is stored.
How a Hard Drive Works
Like an old-fashioned record playerData is recorded and retrieved by a
magnetic head mounted on a movable arm.
Four Main Components of the Hard Drive
Head ActuatorHead ArmDisk PlatterChassis
Head Actuator
Mechanically connects the arms into a single assemble, that is positioned over the disk, controls the head arm.
Head Actuator
Head Arm
Holds the read/write heads.
Can move from hub to edge and back up to 50 times per second.
Head Arm
Disk Platter
Round flat disksStore data in the form of magnetic
patterns.Rotate at very high speeds
Disk Platters
Chassis
Encases and holds all the hard drive components
Chassis
Components of a Hard Drive
Web Sites
Computerhope.com/help/hdd.htmhowstuffworks.com/hard-disk1.htmpcguide.com/ref/hdd/ap/index.htmtekmom.com/buzzwords/
zdhdisk.htmlplatinum.matthey.com/applications/
harddisk.shtml