HyperSCSI is an outdated computer network

protocol Protocol may refer to: Sociology and politics * Protocol (politics), a formal agreement between nation states * Protocol (diplomacy), the etiquette of diplomacy and affairs of state * Etiquette, a code of personal behavior Science and technology ...

for accessing storage by sending and receiving

SCSI command In SCSI computer storage, computers and storage devices use a client-server model of communication. The computer is a client which requests the storage device to perform a service, e.g., to read or write data. The SCSI command architecture was or ...

s. It was developed by researchers at the Data Storage Institute in

Singapore Singapore (), officially the Republic of Singapore, is a sovereign island country and city-state in maritime Southeast Asia. It lies about one degree of latitude () north of the equator, off the southern tip of the Malay Peninsula, borde ...

in 2000 to 2003. HyperSCSI is unlike

iSCSI Internet Small Computer Systems Interface or iSCSI ( ) is an Internet Protocol-based storage networking standard for linking data storage facilities. iSCSI provides block-level access to storage devices by carrying SCSI commands over a TCP/IP ...

in that it bypassed the

internet protocol suite The Internet protocol suite, commonly known as TCP/IP, is a framework for organizing the set of communication protocols used in the Internet and similar computer networks according to functional criteria. The foundational protocols in the suit ...

(TCP/IP) and works directly over

Ethernet Ethernet () is a family of wired computer networking technologies commonly used in local area networks (LAN), metropolitan area networks (MAN) and wide area networks (WAN). It was commercially introduced in 1980 and first standardized in 198 ...

to form its

storage area network A storage area network (SAN) or storage network is a computer network which provides access to consolidated, block-level data storage. SANs are primarily used to access data storage devices, such as disk arrays and tape libraries from serve ...

(SAN). It skipped the routing, retransmission, segmentation, reassembly, and all the other problems that the TCP/IP suite addresses. Compared to iSCSI, this was meant to give a performance benefit at the cost of IP's flexibility. An independent performance test showed that performance was unstable with

network congestion Network congestion in data networking and queueing theory is the reduced quality of service that occurs when a network node or link is carrying more data than it can handle. Typical effects include queueing delay, packet loss or the blocking of ...

. Since HyperSCSI was in direct competition with the older and well established

Fibre Channel Fibre Channel (FC) is a high-speed data transfer protocol providing in-order, lossless delivery of raw block data. Fibre Channel is primarily used to connect computer data storage to servers in storage area networks (SAN) in commercial data cen ...

, and the standardized iSCSI, it was not adopted by commercial vendors. Some researchers at

Huazhong University of Science and Technology The Huazhong University of Science and Technology (HUST; ) is a public research university located in Guanshan Subdistrict, Hongshan District, Wuhan, Hubei province, China. As a national key university directly affiliated to the Ministry of E ...

noted the failure to provide any

transport layer In computer networking, the transport layer is a conceptual division of methods in the layered architecture of protocols in the network stack in the Internet protocol suite and the OSI model. The protocols of this layer provide end-to-end ...

protocol, so implemented a reliability layer in 2007. Another version called HS/IP was developed over the Internet Protocol (IP).

References

External links

* including an introduction and features of HyperSCSI, and a comparison with iSCSI * {{cite news , title= What the Heck Is HyperSCSI? , work= Byte and Switch , date= September 26, 2003 , url= http://www.byteandswitch.com/document.asp?doc_id=40846 , accessdate= May 5, 2011 SCSI Network protocols Ethernet

See also

References

External links