What is the difference between a SATA hard disk and an IDE hard disk?
The hard disk interface is the connecting part between the hard disk and the host system, and its function is to transfer data between the hard disk cache and the host memory. Different hard disk interfaces determine the connection speed between the hard disk and the computer. In the whole system, the quality of the hard disk interface directly affects the running speed of the program and the performance of the system. From the perspective of home users, the hard disk interface is divided into two specifications: IDE and SATA, but they each have their own advantages and characteristics, and users need to choose according to their own conditions.
IDE interface hard disk and motherboard interface
IDE interface hard disks are generally what we commonly call PATA hard disks with parallel specifications. At present, most desktop storage systems use parallel bus interface hard disk products called Ultra-ATA. This specification technology has been applied to desktops since the 1980s. As the mainstream internal storage interconnection technology, the upper-scale system is widely used and has a long time. Therefore, the mature technology brings the low cost of large-scale integrated manufacturing and the rapid development of large capacity.
Since there is no change for a long time, in terms of data transmission, this IDE interface hard disk seems to have some lag, because the current mainstream PATA hard disk can only support ATA/100 and ATA/133 data transmission specifications, and the highest transmission rate is only It can reach 100 or 133MB per second, which can only meet the current large-capacity hard disk data transfer under normal circumstances. In addition, the 80-pin data cables used in this type of hard drive are messy and messy inside the chassis, which will hinder the flow of air in the chassis, thus affecting the cooling of the system. Although the disadvantage is obvious, for some old users, because the original motherboard platform does not support SATA interface, the PATA large-capacity hard disk with IDE interface is still the first choice, and some users think that this type of hard disk is technically mature. , stable, so also choose this type of PATA hard disk.
Serialata.org, which consists of Intel, Dell, Seagate, Maxtor, and APT, has launched a new technical specification for hard drives, Serial ATA, which is a serial interface. At the IDF Fall 2001 conference, Seagate announced Serial ATA. The 1.0 standard officially announced the establishment of the SATA specification, which is also a newly promulgated standard for hardware.
In terms of technical characteristics, we have to admit that PATA hard drives are inferior to SATA hard drives in many aspects such as installation, transfer rate, power consumption, shock resistance, and noise. Because the SATA hard disk has a faster external interface transmission speed, and the data verification measures are more complete, the standard transmission rate specified by the SATA 1.0 specification can reach 150MB/S, which can give full play to the performance advantages of the Serial ATA interface, because the theory of ATA100 The value is 100MB/s, and even the ATA133 is up to 133MB/s. In addition, the first SATA cable is very convenient for installation, and the most important feature of SATA is to support hot swapping. The serial SATA mode has a better data verification method, and the low signal voltage can effectively reduce various interferences, thereby greatly improving the efficiency of data transmission, and the new SATA hard disk connection cable is also more conducive to the heat dissipation inside the chassis.
SATA does not only have advantages, but also obvious shortcomings. Since the SATA specification is not very mature, this type of hard disk requires higher external frequency than parallel specification hard disks. If users have overclocking, they must pay attention, because it will It is often the case that the hard drive cannot be found or the data is corrupted. At present, hard disks supporting SATA 2.0 have also been launched. It is believed that SATA 3.0 will also appear in the market soon, but it is not the case that the higher the standard, the better. For now, this SATA2.0 specification hard disk is mainly aimed at server and network storage applications. , Such as ordinary consumers choose SATA 1.0 specification hard disk products enough.
The general PATA hard disk transfer speeds are:
Ultra-ATA33
Ultra-ATA66
Ultra-ATA100
Ultra-ATA133
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