Server data storage Mainstream disk interface detailed

There are now two main hard disk interface technologies on the server, SATA and SCSI, and the products that use SAS hard drives are currently listed, and of course high-end optical drives, the first two of which are the most common. Here we have a brief introduction to SATA, SCSI, SAS and other interface technologies.

Sata

SATA (serial Advanced Technology attachment) is the abbreviation for Serial ATA, which is currently available SATA-1 and SATA-2 two standards, the corresponding transmission speed is 150mb/s and 300mb/s. SATA is primarily used for PATA interface technology that has replaced bottlenecks. From the speed of this point, SATA in the transmission mode SATA is also more advanced than Pata, has been far away from the PATA hard drive behind. Second, from the data transmission point of view, Sata than Pata anti-interference ability.

SATA-1 has been widely used, its maximum data transmission rate of 150MBPS, signal line up to 1 meters long. SATA is generally a point-to-point connection, that is, a SATA interface connected to the motherboard, the other end directly connected to the hard drive, no other device can share this data line, and parallel ATA allows this (each data cable can connect 1-2 devices), There is therefore no need to set the master and the disk as parallel ATA hard drives.

In addition, SATA has the hot plug function is not comparable to PATA, the use of this feature can be more convenient to build a disk array. Serial data lines due to only the use of four-pin structure, so compared with the mouth installed more convenient, more conducive to reducing the cable in the chassis, conducive to heat dissipation.

Scsi

SCSI (Small Computer system Interface) is a kind of storage cell interface model specially designed for small computer system, which can carry out dynamic division of work for multiple devices in the computer, and can be easily distributed and completed dynamically for multiple tasks required by the system.