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Computer Science Question


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#1
Tyler5690

Tyler5690

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Okay, I have a computer science question. When two hard drives are connected via the same IDE cable, are the drives able to directly access each other, or do they use DMA, or does everything have to be passed through the processor? I was just wondering, if anybody knows the answer, I'd greatly appreciate it!
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#2
SRX660

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The processor is the brain of the computer. Without it none of the hardware would work together to do anything at all. No, the hard drives cannot talk to each other in terms of transferring information. It still has to go thru the processor.

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#3
-=blaster=-

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Not quite, "A DMA transfer essentially copies a block of memory from one device to another. While the CPU initiates the transfer, it does not execute the transfer itself. Bus designs such as PCI typically use bus mastering DMA, where the device takes control of the bus and performs the transfer itself."

More information here.
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