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Barracuda Serial ATA V Product Manual, Rev. B 25
4.0 Serial ATA (SATA) interface
These drives use the industry-standard Serial ATA interface that supports 16-
bit data transfers. It supports ATA programmed input/output (PIO) modes 0–
4; multiword DMA modes 0–2, and Ultra DMA modes 0–5. The drive also
supports the use of the IORDY signal to provide reliable high-speed data
transfers.
For detailed information about the Serial ATA interface, refer to the “Serial
ATA: High Speed Serialized AT Attachment” specification. The specification
can be downloaded from http://www.serialata.com..