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 player • Data is recorded and retrieved by a magnetic head mounted on a movable arm.
Four Main Components of the Hard Drive • Head Actuator • Head Arm • Disk Platter • Chassis
Head Actuator • Mechanically connects the arms into a single assemble, that is positioned over the disk, controls the head arm. Head Actuator
Head Arm Head Arm • Holds the read/write heads. • Can move from hub to edge and back up to 50 times per second.
Disk Platter • Round flat disks • Store data in the form of magnetic patterns. • Rotate at very high speeds Disk Platters
Chassis • Encases and holds all the hard drive components Chassis
Web Sites • Computerhope.com/help/hdd.htm • howstuffworks.com/hard-disk1.htm • pcguide.com/ref/hdd/ap/index.htm • tekmom.com/buzzwords/zdhdisk.html • platinum.matthey.com/applications/harddisk.shtml