HARDDISKS<br />
Hard disks store digital information in a relatively permanent form. <br />Data are stored in thesurface of eachplatter in...
Thisis a typicalhard disk drive. We are goingto open it and look inside.Do not open it at home! Opening a hard disk ruinsi...
Attachedtoonesidewefindtheelectronicsthat control thereading and writingmechanism and the motor thatspinstheplatters. <br ...
These are theplatters and thearm. Theplatters spin at 3,600 to 7,200 rpm. Thearmholdstheread/writeheads and iscontrolledby...
Hard disks havemultipleplatters in ordertoincreasetheinformationthey can store. <br />Thishard disk has threeplatters and ...
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Hard disks

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Hard Disks
(Marshall Brain)

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Hard disks

  1. 1. HARDDISKS<br />
  2. 2. Hard disks store digital information in a relatively permanent form. <br />Data are stored in thesurface of eachplatter in sectors and tracks. Tracks are concentriccircles and sectors are pie-shapedwedgesoneachtrack. <br />Hard disksgivethecomputertheabilitytorememberinformationwhenthepowergoesout.<br />
  3. 3. Thisis a typicalhard disk drive. We are goingto open it and look inside.Do not open it at home! Opening a hard disk ruinsit!<br />
  4. 4. Attachedtoonesidewefindtheelectronicsthat control thereading and writingmechanism and the motor thatspinstheplatters. <br />Underneaththeboardthere are connectionsforthe motor thatspinstheplatters. Thereisalso a ventholethatletsinternal and external aire pressuresequalize.<br />
  5. 5. These are theplatters and thearm. Theplatters spin at 3,600 to 7,200 rpm. Thearmholdstheread/writeheads and iscontrolledbythemechanism in theupper-leftcorner. Thearmmovesfromhubtoedge and back up to 50 times per second.<br />Themechanismthatmovesthearmisincrediblyfast and precise<br />
  6. 6. Hard disks havemultipleplatters in ordertoincreasetheinformationthey can store. <br />Thishard disk has threeplatters and sixread/writeheads.<br />

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