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  • Author:urecovery
  • Publish Time:2018-09-17 09:18

The SATA hard disk is connected to the serial port hard disk using SATA (Serial ATA) port. The SATA hard disk interface is small, the cable is small, and the serial interface has the advantages of simple structure and hot swap. It is now the mainstream interface type.
The trend of PC hard drives in the future. In 2001, the Serial ATA Committee consisting of Intel, APT, Dell, IBM, Seagate and Maxtor officially established the Serial ATA 1.0 specification. In 2002, although Serial ATA related equipment has not yet been officially launched, Serial The ATA committee has pre-empted the Serial ATA 2.0 specification. Serial ATA adopts serial connection mode. Serial ATA bus uses embedded clock signal and has stronger error correction capability. Compared with the past, the biggest difference is that it can check the transmission command (not just data). The error is automatically corrected, which greatly improves the reliability of data transmission. The serial interface also has the advantages of simple structure and hot swap support.
Serial hard disk
Serial hard disk is a new type of hard disk interface that is completely different from parallel ATA. It is well known for transmitting data in serial mode. Compared to parallel ATA, it has a lot of advantages. First, Serial ATA transfers data in a serial serial fashion, transferring only 1 bit of data at a time. This can reduce the number of pins on the SATA interface, making the number of connecting cables less and more efficient. In fact, Serial ATA does all the work with just four pins, which are used to connect cables, connect ground, send data, and receive data, while reducing the system's power consumption and system complexity. Secondly, Serial ATA has a higher starting point and greater development potential. Serial ATA 1.0 defines a data transfer rate of 150MB/s, which is the highest data of 133MB/s than the latest parallel ATA (ATA/133). The transmission rate is still high, and the data transfer rate of Serial ATA 2.0 will reach 300MB/s, and finally SATA will achieve the highest data transfer rate of 600MB/s.
SATAII interface editing
SATA II is developed on the basis of SATA. Its main feature is that the external transmission rate is further increased from SATA 1.5Gbps (150MB/sec) to 3Gbps (300MB/sec), in addition to NCQ (Native Command Queuing, native command). Queue), Port Multiplier, Staggered Spin-up and many other technical features. A simple external transmission rate of 3 Gbps is not a true SATA II.
The key technology of SATA II is 3Gbps external transmission rate and NCQ technology. NCQ technology can optimize the instruction execution order of the hard disk, avoiding mechanically moving the head to read and write different positions of the hard disk in the order of receiving instructions, like the traditional hard disk. In contrast, it sorts and sorts the commands after receiving the commands. The latter heads are addressed in a highly efficient sequence to avoid losses caused by repeated head movements and extend hard drive life. In addition, not all SATA hard drives can use NCQ technology. In addition to the hard drive itself to support NCQ, the SATA controller of the motherboard chipset is also required to support NCQ. In addition, NCQ technology does not support the FAT file system and only supports the NTFS file system.
development changes
Due to the chaotic market of SATA devices, many SATA device providers have abused the "SATA II" in the market promotion. For example, some hard drives known as "SATA II" only support 3Gbps and do not support NCQ, while some only have The 1.5Gbps hard drive supports NCQ. Therefore, Seagate-led SATA-IO (Serial ATA International Organization, SATA International Organization, original SATA working group) announced the SATA 2.5 specification, including the original SATA II. Most of the features - from 3Gbps and NCQ to Staggered Spin-up, Hot Plug, Port Multiplier and newer eSATA (External SATA, external SATA interface) )and many more.
It's worth noting that some of the older motherboards that only support 1.5Gbps South Bridge chips (such as VIA VT8237 and NVIDIA nForce2 MCP-R/MCP-Gb) may not find a hard drive when using SATA II hard drives. The situation of the blue screen. However, most hard disk manufacturers have set a speed selection jumper on the hard disk to force the choice of 1.5Gbps or 3Gbps working mode (a few hard disk manufacturers are set by the corresponding tool software), as long as the hard disk is forced to 1.5Gbps The SATA II hard disk can still be used normally on the old motherboard.
When setting the RAID mode, the SATA hard disk generally needs to install the driver provided by the motherboard chipset manufacturer, but there are also a few older SATA RAID controllers that do not need to load the driver in some versions of the Windows XP system with the latest patch. You can set up RAID.
So what about SATA2 and SATA3? In fact, there is no difference between the SATA2 and SATA3 appearances, just like the USB2.0 interface and the USB3.0 interface, just a different transmission speed. If the motherboard does not support SATA3, you will not be able to use it, it can only be used as SATA2. Perhaps in the near future, SATA3 is the mainstream interface, and SATA4, SATA5 and even SATA6... They have quietly come to us.
SATA (Serial Advanced Technology Attachment) is an industry-standard serial hardware driver interface that is a hard disk interface specification jointly proposed by Intel, IBM, Dell, APT, Maxtor, and Seagate. In 2001, the Serial ATA 1.0 consisting of Intel, APT, Dell, IBM, Seagate, and Maxtor officially established the Serial ATA 1.0 specification. At the IDF Fall conference, Seagate announced the Serial ATA 1.0 standard. The establishment of the SATA specification was announced.
Chinese name serial advanced technology attachment Foreign name Serial Advanced Technology Attachment SATA application area computer
Although Serial ATA related equipment has not yet been officially launched in 2002, the Serial ATA Committee has preemptively established the Serial ATA 1.0 specification. The SATA specification increases the theoretical external transfer rate of the hard disk to 150MB/s, which is 50% higher than the PATA standard ATA/100 and about 13% higher than the ATA/133. With the development of future versions, the SATA interface The rate can also be extended to 2X and 4X (300MB/s and 600MB/s). From the perspective of its development plan, the future SATA will also increase the interface transmission rate by increasing the clock frequency, so that the hard disk can also be overclocked.
SATA interface requires hardware chip support, such as Intel ICH5 (R), VIA VT8237, nVIDIA MCP RAID and SiS964, if the motherboard South Bridge chip can not directly support, you need to choose a third-party chip, such as Silicon Image 3112A chip, etc. However, this will also result in some differences in hardware performance, and the drivers are more complicated.