In vehicle hard disk players and vehicle hard disk video recorders, there are two types of disks available, namely SATA and PATA. Next, we will briefly explain the difference between the two.
PATA stands for 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 of SATA is 150MB/s and the second generation reaches 300MB/s. SATA is meant to replace PATA, just like DDR and SDRAM.
The hard drive port links the drive and the host, transmits data between the drive cache and the host memory, therefore the quality of the port has a direct impact on the speed and performance of the entire system. In general, we have two types of drive port, IDE and SATA. The first is usually applied to early stage players and flutes. SATA is a newcomer, very popular and has a promising future in the vehicle product line.
SDI:
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, improves the credibility of data transmission, and facilitates drive production, since manufacturers do not have to worry about whether their own drive is compatible with the driver made by other companies. Also, it makes disk installation more convenient for customers. The IDE drive is irreplaceable as the IDE port keeps upgrading, always upgrading function; In addition, it has a high value for money. IDE represents a genre of hard drive, however, in actual application, people are more used to calling it ATA-1, the first generation of IDE, but it has been dismissed as the development of port technology. Then many other port types came out, such as ATA, Ultra, DMA, Ultra DMA, and they all belong to IDE drive.
SATA:
The hard drive using the SATA port is also called the SATA drive, which is the drive trend in vehicle electronics. In 2001, the Serial ATA Commission, consisting of Intel, APT, Dell, IBM, Seagate, Maxtor, set the standard for Serial ATA 1.0. In 2002, although SATA drive related products had not been publicly listed, the Serial ATA Commission set the standard for Serial ATA 2.0. Serial ATA adopts the serial data link mode, and the Serial ATA bus adopts an integrated clock signal, which has stronger error correction capability.
Compared to the previous ones, its main difference is that you can examine the order of transmission, as well as the data. It will be corrected only if any errors are found, which greatly improves the credibility of the data transmission. In addition, the structure of the SATA port is simple, and it also supports hot swapping.
The SATA port is a totally different type of drive port. Compared to PATA, SATA has many advantages. On the one hand, SATA transfers data in consecutive serial mode, one data at a time, therefore, it reduces the number of SATA port pins and also the number of link cables, as a result, the effectiveness will be less. be improved. In fact, Serial ATA can work with only 4 pins, and they are applied for bonding wires, bonding ground wires, transmitting data, and receiving data. In addition, this structure minimizes the consumption of the system 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 latest edition of PATA, ATA/133, which can transfer data at a speed of only 133MB/s. Also, Serial ATA 2.0 will reach up to 300MB/s, and finally SATA will be able to transfer data at a speed of 600MB/s.
Technically, how much faster is SATA than PATA?
Since SATA is meant to replace PATA, 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 300MB/s, and the third can reach up to 600MB/s. Therefore, in light of speed, SATA is much more advanced than PATA. Also, 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 multi-channel must be faster than single channel, but that is not the truth.
The reason is that SATA does not have a limit on its speed frequency like IDE does. The transmission speed of the transmission line of SATA is 30 times faster than that of IDE. IDE has to transfer 16 signals at a time, and if the signals don’t 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 reduced to correct errors. SATA transfers data one bit at a time, and the transmission speed of the bit stream is much faster. Also, another improvement of SATA is that its data is consecutive, with smaller size and better heat dissipation and easier drive connection. Compared to IDE, SATA has a much lower consumption rate, which is an absolute plus for vehicle products, along with its unique CRC technology, which makes data transmission much more secure.
According to this state of technology, Yusong products select their hard drive port as follows: IDE ports for car mp4, car mp5 players adopt dual port, that is, both IDE and SATA are applied. All hard disk recorders adopt SATA port.