What is SATA3 in the hard drive?

The official name is "SATARevision3.0", a new specification issued by Serial ATA International (SATA-IO) in May 2009, with the main transmission speed doubling to 6Gbps, while backward compatibility with the old version of the specification "SATARevision2.6" ( is now commonly known as the sata3gbps), the interface, the data line has not changed.

Main new features of SATA Revision 3.0 specification

1, can provide 6Gbps speed link speed between storage unit, disk drive, optical and tape drive, Host bus adapter (HBA), and guarantee new network performance level. Of course, 6Gbps (750mb/s) is only theoretical value, in fact, the SATA interface to send information speed of 600mb/s, but subject to the impact of the system components, the actual speed will be lower, and different environmental differences will be very large.

2, the new Native command sequencing (NCQ) serial instruction, for the need for a large number of bandwidth audio, video applications, to ensure the synchronization of data transmission.

3, NCQ management functions, through the implementation of the NCQ instructions for the host processing and management to optimize performance.

4, improve the power management function.

5, suitable for compact 1.8-inch storage equipment small low insertion force (LIF) connector.

6, designed to allow a lighter, thinner notebook to accommodate 7 mm optical drive connectors.

7, in line with Incits Ata8-acs standard.

8, completely backward-compatible, the new standard products and the old standard products connected to the speed will automatically reduce to 3Gbps or 1.5Gbps.

Sata-io organization also said that the current third edition of the specification for internal SATA interface only, the updated version of the development of "SATARevision3.1" will focus on the eSATA external interface speed also increased to 6Gbps, and solve the external interface durability (plug the number of times), Longer data line stability and scalability issues.

Judging from the specifications and parameters, sata6gbps than now sata3gbps a little stronger.