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3 years, 3 months ago

What's faster; IDE to USB2 or SATA to USB2?

I have both external enclosures but no drives, I'm not sure which drive (IDE or SATA) I should get. From a cost standpoint, they are both about the same and chances are I won't be using the drive internally anytime soon.
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merlin | 3 years, 3 months ago
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Get the SATA; but not because it will be any faster in your setup - the bottleneck is the RPMs of the drive, quality of individual sectors, and the max speed of USB itself!

IDE on an ATA-66's max throughput is 66 megabytes per second, ATA-100 is 100 megabytes per second. SATA II is 300 megabytes per second. USB's maximum 60 megabytes per second, but its known effective rate is about 40 megabytes per second.

So unless you get a really old IDE drive/cable, both IDE and SATA will transfer data faster than USB... but slower (ATA-66) IDE cables will probably have an effective speed of around that of USB, so if you DO go IDE, make sure it is ATA-100 so you are definitely going faster than USB.

The best reason you should go for SATA is because it is much higher bandwidth for if you ever DO install the drive internally. There are other benefits as well, such as that SATA hard drives produce less heat and other mechanical benefits of using the latest and greatest.

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spoon | 3 years, 3 months ago
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Either way you will be hindered in speed by the USB2 at about 480Mbps/Sec... however if you think you will ever use the drive internally or externally using eSATA I would suggest buying the SATA drive as its speed is 1.5 Gbits to 3 Gibts/Sec.

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catch-22 | 3 years, 3 months ago
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SATA II is faster than IDE but either way you are going to be constrained by the speed of the USB2 interface (about half the transfer speed of IDE)

I would suggest you get a SATA to USB2 enclosures because IDE drives are becoming more and more rare (and thus, more costly)

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