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战斗力 鹅
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注册时间 2002-1-3
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Two devices on one cable - speed impact
There are many debates about how much a slow device can impact the performance of a faster device on the same cable. There is an effect, but the debate is confused by the blurring of two quite different causes, called here \"Slowest Speed\" and \"One Operation at a Time\".
[edit] \"Slowest speed\"
It is a common misconception that, if two devices of different speed capabilities are on the same cable, both devices\' data transfers will be constrained to the speed of the slower device.
For all modern ATA host adapters this is not true, as modern ATA host adapters support independent device timing. This allows each device on the cable to transfer data at its own best speed. Even with older adapters without independent timing, this effect only impacts the data transfer phase of a read or write operation. This is usually the shortest part of a complete read or write operation |
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发表于 2008-6-25 13:23
发表于 2008-6-25 13:29
