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hard drives

by baddle / April 23, 2004 12:38 AM PDT

This is probably a stupid question.
I noticed that my 214 mb hard drive is the same physical size as my 8 gb one. so i was wondering .
What exactly determine the amount of space on a hard drive?

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Collapse -
Re:hard drives
by Mark G / April 23, 2004 1:24 AM PDT
In reply to: hard drives

its the number of disks i think

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Re:hard drives
by Coryphaeus / April 23, 2004 3:20 AM PDT
In reply to: hard drives

Several things, but not really size, much.

In the 70s, IBM hard drives were 18 inches across and had 5-7 platters disks. They could hold about a hundred K.

Today's HDs use one or more platters, as many as 5 in a thick drive case. What really increased capacity was the speed of the pulses used to write the data. Faster pulses means more data. Add to that better magnetic material coating the (aluminum) platters that allows smaller regions of magnetic 1s and 0s.

Along with faster pulses came faster spin motors. Put them together and the sky's almost the limit. Check this out.

http://www.cnn.com/2004/TECH/ptech/04/22/computer.speedlimit.ap/index.html

Hope this helps,

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