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Table Of Contents  CertiGuide to A+ (Core Hardware)
 9  Chapter 0100:  Hard Drives
      9  VIII  Physical Characteristics

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Flying Height
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Actuator Arm
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Landing Zone

Regardless of the life of a hard drive, the heads cannot be 'flying' forever. Anytime a drive is not powered, the heads are in contact with the platter. It makes sense, when the heads are resting on the platter, to ensure that data isn't under it. This is where the term landing zone comes from. Putting the heads there is known as head parking. Typically, heads are parked in a landing zone that is one step beyond the last area of data storage. In recent years, parking the heads is an automatic process that happens on power down. Appropriately enough this is called auto-parking.

A head crash can occur from more than contamination. Physical shock can cause a crash. Something notebook makers must concern themselves with. So, with a read/write head made, it has to go somewhere. If it doesn't move, you basically have a magnetic head stuck in one position, like a cassette deck. How it moves is the next topic.


Previous Topic/Section
Flying Height
Previous Page
Pages in Current Topic/Section
1
Next Page
Actuator Arm
Next Topic/Section

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