No, 1 single Hard Disk could not completely use SATA III bandwidth, because most hard disks writing bandwidth couldn't be above 150MB/s, and studying bandwidth could not be higher than 300MB/s, Therefore the SATA III 6Gb/s=6000Mb/s=6000/8MBps=750Bps couldn't be fully utilized. When DMA details is to be transmitted and is obtained https://bookmarkeasier.com/story14831100/everything-about-sata-iii-hard-disk