(Pronounced skuh-zee.) Acronym for Small Computer System Interface. An interface amounting to a complete expansion bus in which one can plug devices such as hard disk drives, CD-ROM drives, scanners, and laser printers. The most common device in use is the hard disk, which contains most of the control circuitry, leaving the interface free to communicate with other peripherals. One can daisy-chain as many as seven devices to a single port. Confusing to consumers is the profusion of standards with their varying combinations of data transfer rates (from 5 to 640 Mbps) and bus widths (8 or 16 bits). Although they continue to play an important role in the high-end hard disk drive market, FireWire (IEEE 1394) and USB 2.0 are increasingly preferred for other types of peripherals, such as digital cameras. See Fast SCSI, Fast/Wide SCSI, SCSI-1, SCSI-2, SCSI-3, Ultra SCSI, Ultra/Wide SSCI, Ultra-3 SCSI, Ultra 320 SCSI, Ultra 640 SCSI.
Technipages Explains SCSI
SCSI initially represented Small Computer System Interface; however, it’s truly outgrown the scope of its original assignment. It’s a fast bus that can connect loads of gadgets to a PC simultaneously, including hard drives, scanners, CD-ROM/RW drives, printers, and tape drives. Different innovations, similar to sequential ATA (SATA), have generally supplanted it in new frameworks.
Fringe gadgets, to the CPU through transports and interfaces, and SCSI is the most well-known interface for connecting these gadgets. SCSI’s productivity is the reason it is so far-reaching. SCSI was progressive concerning information move and similarity when contrasted with the parallel information move interfaces utilized in before days. SCSI additionally permits in reverse where gadgets were good with a prior rendition of SCSI. These gadgets can at present be connected to a more current rendition of SCSI, yet the information move rate will be slower.
Sequential SCSI engineering was presented in 2008, which is significantly quicker and more dependable than the SCSI parallel transport. The Internet convention utilized is Internet SCSI. This interface has no physical characteristics and utilizations TCP/IP to transmit information. SCSI was set up in 1978 by the Shugart Associates System Interface and industrialized in 1981. The pioneer of the innovation was fathered by Larry Boucher who worked at Shugart Associates and later at Adaptec, an organization delivering SCSI, sequential ATA, sequential appended SCSI, and supporting host adaptors.
Common Uses of SCSI
- A SCSI controller has a BIOS extension ROM which serves as a support for hard drives connected through that controller
- FCP is also a transport protocol that mostly transports SCSI commands.
- Buses such as SATA or SCSI fulfil that role in PC class computers.
Common Misuses of SCSI
- SCSI has been restricted to just connecting hard drives.