Why is SATA faster than PATA?

I failed to verify the problem I had struggled with several times. Today I finally found the answer. The impression is that parallel technology is better than serial technology, but we can see that Sata is more difficult than pata !!

From: http://otvety.google.ru/otvety/thread? Tid = 784f58c63e746393

What are SATA and PATA? Both are ata standard hard disks.

What is ata first?

ATA (AT Attachment) is an IDE Driver Interface Specification developed by some software and hardware manufacturers in 1980s. At refers to the ibm pc/at PC and its bus structure, while the updated ATA-2 interface illustrates the latest Eide Driver Interface Specification, EIDE (enhanced IDE) the interface drive is the enhanced type of the IDE interface drive. ATA interfaces are also called ide interfaces, but they are actually slightly different. ata mainly refers to the connection specifications between hard drive and computer, IDE mainly refers to the technical specifications of hard drive.

Differences between PATA and SATA

The full name of PATA is parallelata, which is the parallel ATA hard disk interface specification, which is now the most common hard disk interface specification. The PATA hard disk interface has a very brilliant history, and has been growing from ata33/66 to ata100/133 to the highest ata150. The full name of SATA hard disk is serialata, that is, the Serial ATA hard disk interface specification. Currently, the write speed of the pata100 hard disk is 65 Mb/s, while that of the first generation SATA hard disk is 150 Mb/s, and that of the Second Generation SATA hard disk is as high as 300 MB/S, the speed of the first generation is doubled. The appearance of SATA hard disk interface specifications must replace PATA, just like replacing SDRAM with DDR.

From a technical perspective: How much faster is SATA than PATA?

Since the emergence of SATA replaces PATA, what are the main advantages of SATA over PATA? The first is the speed. We have mentioned that the transmission speed of the second-generation Sata is 300 MB/S, but the transmission speed of the third-generation SATA products has increased to 600 Mb/s. In terms of speed, Sata has moved the PATA hard disk to the back. In addition, Sata is superior to PATA in transmission mode. SATA adopts single-channel transmission and PATA adopts multi-channel transmission. Some may mistakenly believe that Pata's multi-channel should be faster than SATA's single-channel, but it is not.

Because the SATA single data channel does not limit the speed and frequency as PATA does. The transmission speed of SATA transmission lines is nearly 30 times faster than that of PATA. PATA must transmit 16 signals at a time in the data line. If the signal does not arrive in time or has a delay, the error data will be generated. Therefore, the speed of bit stream transmission must be slowed down to correct errors. While SATA transmits only one bit of data at a time, the bit stream transmission speed is much faster. This is like a dribble game. It is much easier to deliver a ball each time than to play 16 balls at a time. In addition, another improvement of SATA lies in its data connection, which is smaller in size, better in heat dissipation and convenient in connection with hard disks. Compared with PATA, Sata has lower power consumption, which is good news for laptops and its unique CRC technology makes data transmission more secure.