【 Weak current College 】 new aspects of the old hard drive interface

Hard drive interface is the hard drive and the connection between the host system, function is the hard disk cache and transfer data between the host memory. A different hard disk interfaces determine the hard disk and the speed of the connection between computers, throughout the system, the hard drive interface on the pros and cons of running the program directly affects the speed and system performance is good or bad. From an overall perspective on the hard disk interface is divided into the IDE, SATA, SCSI and fibre channel four, IDE interface hard disk used for household products, also applies to server hard drive, SCSI interface is mainly used in the server market, and fibre channel only in the high-end server, which is very expensive. SATA is a new hard drive interface type, as well as for market penetration phase, in the domestic market has a broad prospects. In the IDE and SCSI in broad categories, which can be divided into a variety of specific interface types, each with different specifications, have different transmission speeds, such as ATA100 and SATA; Ultra160SCSI and Ultra320SCSI represents a specific hard drive interface, its own speed differences are large.
IDE
The IDE's full name in English as "IntegratedDriveElectronics", i.e. "electronic integrated drive", which purported to mean "the hard disk controller" and the "plate of" integrated with the hard drive. The disk and controller integrated approach reduces hard drive interface cable length, number and data transmission reliability has been enhanced to hard drive manufacturing up easier, because the hard disk manufacturers do not need to worry about your hard drive and other vendors that controller compatible. On the users hard drive installation seems more convenient. IDE this interface technology from inception has been in continuous development, the performance also continued to increase, their affordable, compatibility features, as it makes other types of hard disk cannot override status.

IDE hard drive represents a type, but in a real application, it is also used by the IDE to call first IDE type hard disk ATA-1, this type of interface as an interface technology development has been eliminated, and the subsequent development branch out more types of hard drive interface, such as ATA, UltraATA, DMA, UltraDMA and other interfaces are part of the IDE hard drive.

SCSI
The English name for SCSI "SmallComputerSystemInterface" (small computer system interface), IDE (ATA) completely different interfaces, the IDE interface is the ordinary standard PC interfaces, SCSI is not designed specifically for the hard disk interface, is a widely used in the minicomputer on high-speed data transmission technology. SCSI interface with a wide range of applications, multiple tasks, bandwidth, CPU utilization is low, and hot-swappable, etc., but higher price makes it difficult if the IDE hard drive so popular, thus the SCSI hard drive is mainly used in high-end servers and in, high-end workstation.

Fibre Channel
Fibre channel is the English spelling, and FibreChannel SCIS interface like fibre channel initially or as a hard drive design and development of interface technology that is designed specifically for network systems design, but as storage system needs for speed, gradually applied to the hard drive system. Fibre Channel hard drive is to improve the lot of the hard disk storage system development speed and flexibility, it has significantly improved the lot of the hard drive system of communication speed. Fibre Channel's main characteristics are: hot-swappable, high-speed bandwidth and remote connections, connect the device number, etc.

Fibre channel is like a server or a multiple hard drive system environments, can satisfy high-end workstations, servers, mass storage sub-network, peripherals, room through a hub, switch, and point-to-point connection for bi-directional serial data communication, system on high data rates.

SATA
SATA (SerialATA) port hard drive also called serial hard drive, are the future trends in PC hard drive. In 2001, from Intel, IBM, Dell, APT, Seagate, Maxtor that several major manufacturers of SerialATA Committee formally established SerialATA1.0 specification, in 2002, although serial ATA related equipment has not yet officially listed, but SerialATA Committee has established the first SerialATA2.0 specification. SerialATA a serial connection, the serial ATA bus use embedded clock signal, with a stronger capacity to, and correction of past compared to the biggest difference is able to transfer instructions (just data) to check if you find errors automatically corrected, in large part to improve the reliability of data transfer. Serial interface also has a simple structure, the benefits of support hotplug.