Function and use of SATA hard disk interface
SATA hard disk interface It is the connecting part between the hard disk and the host system. Its function is to transfer data between the hard disk cache and the host memory. Computer connection speed and SATA hard disk interface Related, because different SATA hard disk interfaces can determine the connection speed between hard disk and computer, the function of SATA connector hard disk interface can directly affect the running speed of programs and system performance in the whole system. From the perspective of self-employed, the hard disk interface has two specifications: IDE and SATA, which have their own advantages and characteristics. Users need to choose according to their own situation.
IDE interface hard disk and motherboard interface IDE interface hard disk are usually called PATA hard disk with parallel specification. At present, most desktop storage systems use parallel bus interface hard disk products called ultra ATA. Since the 1980s, this specification technology has been applied to desktop system as the mainstream internal storage and interconnection technology. Due to wide application fields and long time, mature technology can bring greater integrated manufacturing cost and rapid development of large capacity.
No change has been made for a long time. From the perspective of data transmission, the IDE interface hard disk seems to lag behind, because the current mainstream PATA hard disk can only support ATA / 100 and ATA / 133 data transmission standards, and the maximum transmission rate can only reach 100 or 133mb per second, which can only meet the high-capacity hard disk data transmission under normal conditions. In addition, the 80 pin data cable used by this hard disk is disorderly in the chassis, which will hinder the flow of air in the chassis and affect the heat dissipation of the system. Although the disadvantages are obvious, for some old users, because the original motherboard platform does not support SATA interface, this IDE interface PATA high-capacity hard disk is the first choice. Some users will think that this hard disk technology is mature and stable, so they also choose this PATA hard disk.
From the technical characteristics, PATA hard disk is inferior to SATA hard disk in installation, transmission speed and power consumption, earthquake resistance, noise and so on. Because SATA hard disk has fast external interface transmission speed and perfect data detection measures, and the standard transmission speed specified in sata1.0 specification can reach 150MB / s, it can give full play to the performance advantages of serialata interface, because the theoretical value of ata100 is 100MB / s, and even ata133 is 133mb / s.
In addition, the SATA cable is easy to install. The most important feature of SATA is that it supports hot plug. Through better data verification methods, low signal voltage can effectively reduce various interferences, so as to more effectively improve the efficiency of data transmission. The new SATA hard disk connection cable is also more conducive to heat dissipation inside the chassis.
SATA connector can bring many benefits in terms of power consumption, simple installation, hot plug support, internal heat dissipation, driver configuration and so on. At an economical price, it realizes a higher level of excellent performance, high capacity, high protection and simple use for external storage solutions. With the transition of storage industry from parallel interface to serial interface technology, the I / O interfaces of desktop computers, mobile computers, storage devices and some server applications began to change to serial technology. According to the market analysis, the overall sales volume of serial ATA / SATA connectors, including connectors, sockets and cables, is expected to reach 903 million in recent years, compared with 141 million in 2003. As far as the serial interface technology itself is concerned, it has the advantages of reducing cable, increasing data throughput, improving serial interference and impedance matching. In addition, people's enthusiasm for serial interface can also be partly driven by leading chip and connector manufacturers.
