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On 10/24/2011 10:28 AM, walt wrote: |
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> ... |
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> Over at least six trials on each docking station I consistently |
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> get 105 seconds for USB and 84 seconds for e-sata, a 5:4 ratio |
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> in favor of e-sata/sata over USB3/sata... |
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Wow, lots of great answers, guys, thanks. Enough material to give |
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me lots more questions to ask you :) |
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Like, for example, in theory the raw bit-rate for USB3 is more than |
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enough to keep up with any existing consumer hard drive, right? The |
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speed of usb/sata protocol translation should be very fast compared |
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to the speed of a spinning mechanical disk (I think?) |
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Now, lack of DMA is another story for hard disks, certainly. Here's |
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where my ignorance of hardware limits my thinking: |
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AFAIK the device driver *always* sits between the disk drive and the |
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DMA hardware, doesn't it? |
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Seems to me that the USB3 driver should be fast enough to shuttle the |
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raw disk data (somehow) to the DMA hardware just like the pata/sata |
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drivers do. It's that "somehow" that I obviously don't understand. |
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Where am I thinking wrong about the problem? |
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