HD Plate densities and their correlation with Speed

373 Views 2 Replies 3 Participants Last post by ArmenianLegend, Mar 12, 2009

Smykster

Discussion Starter · Mar 11, 2009

Correct me if i'm wrong, but is the reason for the WD 640gb AAKS model being the most popular because of its plate density? I believe the 640's have 2 320gb plates as opposed to 500gb, 750gb and 1tb models having 250gb plates. Is this plate density what gives it it's speed? If so how does a 640aaks fair against a caviar black 640 with 32mb cache? Or in another case, how does a HDD with a 320 gb plate(aaks) and 16mb cache density fair against an hdd with a 250 plate adn 32mb of cache(caviar black). Thanks in advance for any input!

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Chucko

· #2 · Mar 11, 2009

In general, the denser the platter, the higher the sustained transfer rate. More bits per unit area at a constant RPM = more bits per second.

Can't help you with the specific drives you've asked about, sorry.

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ArmenianLegend

· #3 · Mar 12, 2009

well for one the aaks is the blue model and the aals is the black model the aals is bit faster as it has TWO processing units annnd 32mb of mem, it has better tranfer rates plus better access times, best 7200rpm drives u can get, theres also the 7200.12 with 500gb platers which have THE fastest transfer rates rivaling velociraptors but they have HORIBLE access times at 15ms+.

and to ur second questions the 320gb plater would smoke the 250gb plater, in real life tho the biger u get the faster you get, its because the more you fill up the drive the slower ur drive becomes, so the more space the better kind of thing.

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