IDE/ATA Transfer Modes and Protocols

It’s important to understand different transfer modes and protocols that a drive (and interface) supports when you copy a hard drive.

Most of the advances in newer IDE/ATA standards are oriented around creating faster ways of moving data between the hard disk and the PC system. Since the IDE/ATA interface is in essence a communication channel, support for a given transfer mode or protocol requires support from the devices on both ends of the channel. This means that both the hard disk and the system chipset and BIOS must support the mode in question.

I/O (PIO) modes is the oldest IDE/ATA transfer mode and then direct memory access (DMA) modes, and then the new Ultra DMA modes that superceded regular DMA and are the transfer modes of choice for newer hardware.

I/O (PIO) modes

DMA transfer mode 1

DMA transfer mode 2

UDMA transfer modes

ATA-7 Ultra ATA/133             133mb/s                         UDMA 6 (133)

Data Copy king adopts UDMA 6 design, so if the hard drive supports UDMA transfer modes and protocols, the disk image speed will reach its final best tested speed at 7GB/min and disk wipe speed at 8GB/min.


One Comment to “IDE/ATA Transfer Modes and Protocols”

  1. .

    tnx for info!…


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