What is the need for cache on a hard drive?

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Unforgettable98

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Dec 27, 2014
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I don't know what the difference is between a 7200rpm hard drive with 64mb cache and a 7200rpm hard drive with 32mb cache. What does it affect?
 
Solution
ronintexas
The speed of reading/writing to the drive. The more cache you have, the faster the drive. They have started making hybrid drives (SSD that caches the HDD) to make reads/writes even faster.
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