Difference between revisions of "Small Computer System Interface"
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| − | The '''Small Computer System Interface''' (SCSI) is a previously popular type of bus to link digital storage media and other devices to | + | [[File:Logitech LHA-20B C-Bus SCSI HBA.jpg|thumbnail|A storage controler card for external SCSI connections]] |
| + | The '''Small Computer System Interface''' (SCSI) is a previously popular type of bus to link digital storage media and other devices to [[computer]]s. Introduced in 1986, this interface type is best know by its acronym, SCSI, which is pronounced "scuzzy."<ref name="lifewire">https://www.lifewire.com/small-computer-system-interface-scsi-2626002</ref><ref name="computerhope">https://www.computerhope.com/jargon/s/scsi.htm</ref> It is based on an older bus standard, Shugart Associates System Interface.<ref>https://computer.howstuffworks.com/scsi1.htm</ref> | ||
| − | Used internally, SCSI connections are made with a ribbon cable between the drive and the system's motherboard or storage controller card. External devices can also be connected to the storage controller card using a SCSI cable.<ref name="lifewire">https://www.lifewire.com/small-computer-system-interface-scsi-2626002</ref> | + | Used internally, SCSI connections are made with a ribbon cable between the drive and the system's [[Motherboard|motherboard]] or storage controller card. External devices can also be connected to the storage controller card using a SCSI cable.<ref name="lifewire">https://www.lifewire.com/small-computer-system-interface-scsi-2626002</ref> |
==Interface types== | ==Interface types== | ||
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{{Reflist}} | {{Reflist}} | ||
| − | [[Category:Computer | + | [[Category:Computer Hardware]] |
Latest revision as of 19:43, October 3, 2019
The Small Computer System Interface (SCSI) is a previously popular type of bus to link digital storage media and other devices to computers. Introduced in 1986, this interface type is best know by its acronym, SCSI, which is pronounced "scuzzy."[1][2] It is based on an older bus standard, Shugart Associates System Interface.[3]
Used internally, SCSI connections are made with a ribbon cable between the drive and the system's motherboard or storage controller card. External devices can also be connected to the storage controller card using a SCSI cable.[1]
Interface types
The following are some of the most common types of SCSIs which have existed.
- Fast SCSI: 10 MBps; connects eight devices[1]
- Fast Wide SCSI: 20 MBps; connects 16 devices[1]
- Ultra Wide SCSI: 40 MBps; connects 16 devices[1]
- Ultra3 SCSI: 160 MBps; connects 16 devices[1]
- Ultra-640 SCSI: 640 MBps; connects 16 devices[1]
SCSI communication is much slower that modern standards, such as SATA, which is now commonly used in place of SCSI.