What is the difference between SATA hard drive and SATA2 hard disk

Discussion in 'General Topics' started by JohnM, Apr 11, 2014.

  1. JohnM Administrator

    SATA2 hard disk theory transmission speed is 3 gb/s, is a times the bandwidth of the first generation of SATA interface. Yet despite the SATA2 to increase the interface bandwidth to 3 gb/s, but the actual performance improvement is minimal. In fact, real disk speed is the key to the internal transfer rate decision, as long as the external transport is higher than the internal transfer rate is about 30% more than enough. SATA2 provided 3 gb/s transmission bandwidth is just like a faucet, while the current hard disk about 60 MB/s ~ 70 MB/s actual internal transfer rate is just like a water pipe. When the faucet flow significantly more than provide the amount of water pipes, again increase the faucet flow almost meaningless. Really let SATA2 work should be NCQ technology, it is recommended that you don't just because a SATA2 interface around the choose and buy of their strategy. If a SATA2 hard drive is not equipped with NCQ technology, then its actual performance and SATA distinction is not big. Only with the help of the NCQ technology, SATA2 hard disk can truly show a performance advantage. In addition to the hard disk with NCQ technology, disk controllers have to support the standard. Currently supported NCQ occurrence of the chip with Intel ICH6/7, VIA VT8251 and SIS 966, and single chip nForce4 series and so on. If you have used the chipset of motherboard, so it is necessary for the pursuit of higher performance to purchase with NCQ SATA2 hard disk. In addition, part of the chipset of the so-called SATA2 support is only compatible with, and can't achieve 3 gb/s interface bandwidth and NCQ function, should pay attention to when the choose and buy...

Share This Page