A CDE Definition
(Shugart Associates Systems Interface) A peripheral interface developed by Shugart in 1981 that evolved into the ANSI SCSI standard in 1986. It was renamed SCSI (small computer system interface) because ANSI does not allow corporate names in its standards. See SCSI.
(Small Computer System Interface) Pronounced "scuzzy," SCSI is a hardware interface for up to 15 peripherals connected to one PCI or PCI Express card ("SCSI host adapter") on the motherboard. Introduced in 1986 by Shugart Associates (see SASI), this original parallel architecture was largely replaced by a serial version (see serial attached SCSI).
SCSI hard drives were used in mainframes, servers and storage arrays in the late-1980s and 1990s because they were very robust, and they were initially the only ones used in RAID configurations (see RAID). Eventually, less-costly IDE drives became highly reliable (see IDE and SATA).
SCSI Is a Mini-LAN
The SCSI bus is like a mini-LAN connecting 15 devices; actually 16 but the host counts as one. Any two can communicate at one time: host-to-peripheral and peripheral-to-peripheral. For more details, see SCSI Architecture Model, SCSI signaling, SCSI connectors and SCSI switch.
A "Scuzzy" Daisy Chain
Before/After Your Search Term
|Sarbanes-Oxley Act||SATA 3|
|SAS 70||SATA II|
|SAS System||SATA III|
Terms By Topic
Click any of the following categories for a list of fundamental terms.