Prednosti Fibre Channel tehnologije se uglavnom odražavaju

(1) Visoka propusnost, brzina prijenosa podataka od 200MB/s je trenutno postignuta, a 400MB/s je prošao test;

(2) Mogućnost adresiranja velikog-kapaciteta i mogućnost proširenja kapaciteta, koja može pristupiti 16 miliona čvorova;

(3) Visoko centralizovani podaci i globalno dijeljenje mogućnosti skladištenja;

(4) Duga udaljenost veze između svakog para čvorova, više-optički kabl može doseći 500 metara, a single{3}}optički kabl može doseći 10 kilometara;

(5) Modularno proširenje i povezivanje;

(6) Visoka dostupnost ili -tolerantni sistem usluga može se uspostaviti korištenjem optičkih prekidača i povezanog softvera;

(7) Može olakšati uspostavljanje balansiranja opterećenja i sistema serverskih klastera.

Fibre Channel technology is a new technology developed by combining the advantages of "channel technology" and "network technology": channel technology is a hardware-intensive technology, because it is designed to quickly transmit a large amount of data in the buffer area, which can Connect devices directly without using too much logic; network technology is software-intensive because packets need to be routed across the network to one node among many devices, and network technology has the ability to operate a large number of nodes. Fibre Channel technology has been designed from the outset to combine the above-mentioned advantages of channel technology and network technology. Five independent layers are defined in the Fibre Channel protocol, from the physical medium to the high-level protocol transmitted in the Fibre Channel, which contains the overall picture of the Fibre Channel technology. The following are the functional modules of these five layers: ① FC-0, physical layer, defines the physical port characteristics of the connection, including the physical characteristics, electrical characteristics and optical characteristics of the medium and connectors (drivers, receivers, transmitters, etc.), transmission speed and some other port characteristics. Physical media are fiber optic, twisted pair, and coaxial cable. This layer defines how light travels on optical fibers and how the transmitter and receiver work over various physical media.

②FC-1, transmission protocol, FC-1 stipulates the encoding method and transmission protocol of 8B/10B according to the ANSI X3 T11 standard, including serial encoding, decoding rules, special characters and error control. The transfer encoding must be DC balanced to meet the electrical requirements of the receiving unit. Special characters ensure that what appears in the serial bit stream is a short character length and a certain transition signal for clock recovery. This layer is responsible for taking a sequence of signals and encoding them into usable character data.

③ FC-2, frame protocol, defines the transmission mechanism, including frame positioning, frame header content, usage rules, and flow control. Fibre Channel data frames are of variable length and addressable. The length of the Fibre Channel data frame used to transmit data is up to 2K, so it is very suitable for the transmission of large-capacity data. The content of the frame header includes control information, source address, destination address, transmission sequence identification and switching equipment. The 64-byte optional header is used for protocol mapping when other types of networks are transmitted over Fibre Channel. Fibre Channel relies on the contents of the data frame header to initiate operations.

④ FC-3, public service, provides public services with advanced features, that is, structural protocol and flow control between ports, it defines three services: striping (Striping), search group (Hunt Group) and multicast (Multicast) ). The purpose of striping is to use multiple ports to transmit in parallel on multiple connections, so that the I/O transmission bandwidth can be extended to a corresponding multiple; the search group is used for multiple ports to respond to an address with the same name. Improve efficiency by reducing the probability of reaching a "busy" port; multicast is used to deliver a message to multiple destinations.

⑤ FC-4, the protocol mapping layer, defines the mapping relationship between the bottom layer of Fibre Channel and the upper layer protocol (Upper Layer Protocol) and the application interface with the current standard. The current standard here includes all existing channel standards and network protocols. , such as SCSI interface and IP, ATM, HIPPI, etc.

Može se vidjeti da je stog protokola Fibre Channel nosilac prijenosa različitih-protokola podataka visokog nivoa, posebno prijenosa SCSI i IP podataka. Proces prijenosa protokola visokog{1}}nivoa podataka kao nosioca je zapravo proces mapiranja protokola visokog-podataka na uslugu prijenosa fizičkog sloja steka protokola. Među njima, najčešće korišćeni Fibre Channel Protocol je mapiranje SCSI podataka, naredbi i informacija o statusu u uslugu prijenosa FC fizičkog sloja. FCP ima nezavisnost da radi na svim topologijama Fiber Path i svim vrstama usluga.