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Advance Member
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引用:
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作者steven830629
互相傳輸的話,的確是兩個都會以 DMA 2 的模式來傳輸,
但是如果平常不互相傳輸的時候,
DMA 4 的裝置會以 DMA 4 運作,
DMA 2 的裝置會以 DMA 2 運作,
跟有沒有插在同一條排線上沒有關係,
除非...那條排線是傳輸速度較慢的排線...
不過老實說,即使是這樣, 高速傳輸裝置還是會影響一點效能的。
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該是多少就是多少，除非是很舊的系統 
http://help.lockergnome.com/lofiver...php/t30541.html
引用:
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The ability of an IDE/ATA channel to [u]operate a master and slave device using different transfer modes is called [b]independent device timing[b][u]. The hard disk controllers integrated on modern chipsets all pretty much support independent timing, as do modern add-in controllers, but this was not always the case. Independent timing can be an issue if, for example, you upgrade an older PC and get a new, high-speed drive, but want to continue to be able to use the older one on the same channel with the new one...
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