Rory Pettitt 1432 computing presentation1

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Rory Pettitt 1432 computing presentation1

  1. 1. Hard DriveHow it works~ Rory Pettitt
  2. 2. What is a Hard Drive?A HDD is a device for storing and retrievingdigital information, primarily computer data.
  3. 3. BoardThe Electronics control the read & Writemechanism and the motor the spins theplatters.The Electronis also assemble the magneticdomains on the drive into bytes for reading andthen tern them into MD’s (Writing).
  4. 4. HDD: Under The BoardThere are connections for the motor that spinsthe platters, there are also highly-filtered venthole to let air pressures equalize.The platters spin at 3,600 or 7,200 rpm when itis operating.The arm holds the read/write heads. The arm isable to move the heads from the hub to theedge of the drive. A trypical HDD can do thisupto 50 times/s
  5. 5. HDD: Platters andHeadsHDD’s increase the amount of information it canstore by including multiple platters.
  6. 6. HDD: Data StorageData is store on the surface of aplatter in ‘Sectors’ and ‘Tracks.’Trachs in yellow, sector in blue.A sector contains a fixed number of bytes.Low-level formatting allows the drive toestablish tracks and sectors on the platter.

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