Seagate Barracuda ST3120022A - Manual (Page 33)

Barracuda 7200.7 Product Manual, Rev. E 23
4.0 ATA interface
These drives use the industry-standard ATA task file 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.
You can use a daisy-chain cable to connect two drives to a single AT host bus. For detailed information about
the ATA interface, refer to the draft of AT Attachment with Packet Interface Extension (ATA/ATAPI-6), NCITS
T13 1410D, subsequently referred to as the Draft ATA-6 Standard.
4.1 ATA interface signals and connector pins
Figure 1 on page 24 summarizes the signals on the ATA interface connector that the drive supports. For a
detailed description of these signals, refer to the Draft ATA-6 Standard.