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What is the Difference Between SATA and PATA?
In Car Hard Disk Players and Car Hard Disk Video Recorders, two types of drives are available namely SATA and PATA. Next, we will briefly explain the difference between the two.
PATA means parallel ATA. Parallel ATA drives have a long history, from ATA33/66 to ATA100/133 and now we have ATA150.
SATA stands for Serial ATA. The write speed of ATA100 is 65MB/s, but the speed of the first generation SATA is 150MB/s and the second generation reaches 300MB/s. SATA is intended to replace PATA, just like DDR and SDRAM.
The hard disk port connects the disk and the host, transmits data between the disk cache and the host memory, therefore, the quality of the port has a direct impact on the speed and operation of the entire system. In general, we have two types of disk ports, IDE and SATA. The former is usually applied to early stage players and registrants. SATA has just appeared, enjoys great popularity, with a promising future in the automotive product line.
IDE stands for “Integrated Drive Electronics”, which integrates the hard drive controller and the drive body. In this way, it reduces the number and length of the drive cable, increases the reliability of data transmission, making the production of the drive easier, since manufacturers do not have to worry about whether their drive is compatible with the controller produced by the company others. In addition, it makes disk installation more convenient for customers. The IDE drive is irreplaceable as the IDE port continues to improve itself, with its function always improving; in addition, it has a high quality-value ratio. IDE represents a genre of hard disk, however, in the current application, people are more accustomed to call it ATA-1, the first generation of IDE, but it is removed as the development of port technology. Many other types of ports appeared later, such as ATA, Ultra, DMA, Ultra DMA, and all belong to the IDE drive.
The hard drive that uses the SATA port is also called a SATA drive, which is the drive trend in automotive electronic products. In 2001, the Serial ATA committee, consisting of Intel, APT, Dell, IBM, Seagate, Maxtor, established the standard for Serial ATA 1.0. In 2002, although SATA drive-related products were not publicly listed, the Serial ATA Commission established the Serial ATA 2.0 standard. Serial ATA adopts serial data connection mode, and Serial ATA bus adopts built-in clock signal, which has more powerful error correction ability.
Compared to the previous ones, its main difference is that it can examine the transmission order in addition to the data. It will correct itself if any error is detected, which, to a great extent, improves the reliability of data transmission. In addition, the structure of the SATA port is simple, and it also supports hot-swap.
The SATA port is a completely different type of disk port. Compared to PATA, SATA has many advantages. On the one hand, SATA transfers data in a sequential serial way, one piece of data at a time, so it reduces the number of SATA port pins and also the number of connecting cables, as a result, the effectiveness will be improved. In fact, Serial ATA can only work with 4 pins, and they are applied to cable connection, ground wire connection, data transmission and data reception. In addition, this structure minimizes system consumption and makes it less complicated. On the other hand, Serial ATA has a higher starting point, with a lot of potential.
The data transmission speed of Serial ATA 1.0 can reach up to 150MB/s, which is even higher than the newest edition of PATA, ATA/133, which can transfer data at a speed of only 133MB /s. Furthermore, Serial ATA 2.0 will reach up to 300MB/s and finally SATA can transfer data at a speed of 600MB/s.
Technically, how much faster is SATA than PATA?
Since SATA is intended to replace PATA, then what are the advantages of SATA, compared to PATA? The first is speed, as we mentioned above, the second generation of SATA can transfer data at 300 MB/s and the third can reach up to 600 MB/s. Therefore, in light of speed, SATA is much more advanced than PATA. Moreover, the transmission mode of SATA is much better than that of IDE. SATA adopts single-channel transmission mode while IDE adopts multi-channel transmission code. Literally, some people may think that, multichannel should be faster than single channel, but, it is not the truth.
The reason is that SATA does not have a limit on its speed frequency like IDE does. The transmission line speed of SATA is 30 times faster than that of IDE. The IDE must transfer 16 signals at the same time, and if the signals do not arrive on time or there is a delay, there will be data errors. As a result, the transmission rate of the bit stream will have to be slowed down to correct the errors. SATA transfers data one bit at a time and the transmission speed of the bit stream is much faster. Moreover, another improvement of SATA is that its data is contiguous, with smaller size and better heat dissipation and easier disk connection. Compared to IDE, SATA has a much lower consumption rate, which is an absolute advantage for automotive products, along with its exclusive CRC technology, making data transmission much safer.
According to this state of technology, Yusong products choose its hard disk port in this way: IDE ports for vehicle mp4 players, vehicle mp5 adopt dual port, that is, both IDE and SATA are applied. All hard disk recorders use the SATA port.
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