 Hard Drive Speeds, Help Elimininate My Confusion |
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 Jul 8 2008, 11:08 AM
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Forum Addict  Group: Members Posts: 5,774 Joined: 3-September 05 From: Killeen, TX Member No.: 33,068  |
Appreciate any inputs which clear my cobwebs. I stated that data transfers using an external hard drive (either PATA or SATA) would be slower than such transfers done with the drive connected internal to the computer case. Although I really had in mind something else (data transfers between systems on a home network), my error has prompted me to do a little more reading. Result? I now think that I was correct, if erroneous in my thinking  ...I don't see how a USB bus allows for faster processing of data from a hard drive that is either PATA or SATA...than a PATA/SATA hard drive connected to the system bus.I don't know enough about eSATA to include it in my analysis, but I encourage inputs about eSATA as well as my focus on internal vs external. The logic problem that I have is...an external drive is ultimately going to be limited, not by the USB bus, but by the native abilities of the drive in the enclosure. At least, that's what I think. Which means that a SATA drive will always be faster than a PATA drive...and a SATA II drive will always be faster than a SATA drive...and eSATA seems to be faster than both. All comments appreciated, thanks . Technical jargon is acceptable .I found a hard drive chart that may be of interest to some: http://www.tomshardware.com/charts/hard-di...rmance,658.html Louis |
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Jul 8 2008, 11:56 AM
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arachibutyrophobia Group: BC Advisor Posts: 4,466 Joined: 4-March 05 From: Northern CA. Member No.: 13,532 |
Actually, you are right, but the reason is that the USB controller regulates the speed, and is much slower. The bus speed of a USB 2.0 is 480Mbps, but the controller will be much slower.
-------------------- 'Tis better to have loved and lost than never to have loved at all. -Alfred Lord Tennyson
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Jul 8 2008, 07:28 PM
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 Computer Masochist Group: Moderator Posts: 7,405 Joined: 27-January 07 From: Cleveland, Ohio Member No.: 108,618 |
I agree with your assumptions. I once had a page saved about various transfer rates. Trying to read it made my brain freeze. Can't seem tp locate it
Here's one: http://www.storagereview.com/guide2000/ This post has been edited by garmanma: Jul 8 2008, 07:32 PM -------------------- Mark
 why won't my laptop work? Having grandkids is God's way of giving you a 2nd chance because you were too busy working your butt off the 1st time around Avatar by Handplane |
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