SATA 6.0Gb/s (SATA III, 6.0Gbps) - SATA revision 3.0 doubles the speed of the current 3Gb/s version, reaching transfer speeds of 6Gb/s. SATA II uses same encoding as SATA I featuring an actual data transfer rate of 2.4 Gb/s, or 300 MB/s. Check out this complete pinout for a SATA pin power connector. The PATA interface is not visible in the diagram. In practice, some older SATA systems require the peripheral device's speed be manually limited to 150MB/s with the use of a jumper. Serial ATA (SATA) Personal Computer Bus Pinout and Signal names. SATA II devices are required to support the original 1.5Gb/s rate. A 3Gb/s signalling rate was added to the PHY layer. SATA 3.0Gb/s (SATA II, 3.0Gbps) - second-generation of SATA interfaces. The simplicity of a serial link and the use of LVDS allow to use of longer drive cables. Actual data transfer rate is up to 1.2 Gigabits per second (Gb/s), or 150 megabytes per second (MB/s). SATA/150 (1500Mbps) - first-generation of Serial ATA interfaces, also known as SATA/150, run at 1.5 Gigahertz (GHz). The Serial ATA interface cable consists of four conductors in two differential pairs, plus three ground connections.The cable size may be 30 to 26 AWG with a maximum length of one meter (39.37 inches).
The PATA power connector may be used in instead of the SATA power cable to supply a connection which is more rugged and reliable then the SATA-1 power connection. A Serial ATA Hard drive may also have a third connector for legacy PATA power connections. The Serial ATA (SATA) bus is defined over two separate connectors, one connector for the data lines and one for the power lines.
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