SATA throttling using external HD cabinet?

Jiddick ExRex

macrumors 65816
Original poster
May 14, 2006
Roskilde, DK
I do not know whether my old interal sata harddisk is sata I or II. I was just wondering if this matters at all if I slam it into an external USB cabinet? Wouldn't the bottleneck be the USB connection and not whether or not the interface is SATA I or II?


macrumors G5
Yes. USB 2.0 is far slower than either SATA-150 or SATA-300.

Firewire is faster than USB, but still slower than SATA-150

Essentially, you can quit worrying about the SATA-150 vs 300 speed difference, because the disk platter itself can't keep up with SATA300, so there is little or no difference in any case.


macrumors regular
Aug 19, 2002
Boston, MA

Drives can barely saturate SATA-150 as it is, making the difference negligible even inside a tower.

It certainly won't matter on a slow external bus.
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