SCSI协议旨在提供高效的对等I/O总线，其主机和外围设备的最大数量由总线宽度（8或16）决定。数据可以异步或同步传输，传输速率主要取决于设备实现和电缆长度。SCSI是一种I/O接口，可在多种介质和传输速率下运行。本国际标准定义了光纤通道映射层（FC-4），它使用NCITS项目1311D、光纤通道帧和信令接口（FC-FS）定义的服务在SCSI启动器和SCSI目标之间传输SCSI命令、数据和状态信息。使用此标准，可以仅使用标准光纤通道帧和序列格式在光纤通道上传输标准SCSI命令格式、传输标准SCSI数据和参数字符串，以及接收SCSI状态和检测信息。 光纤通道协议与光纤通道类别的服务1、2和3一起运行，并跨光纤通道结构和仲裁环路运行。

The SCSI protocol is designed to provide an efficient peer-to-peer I/O bus with the maximum number of hosts and peripherals determined by the bus width (8 or 16). Data may be transferred asynchronously or synchronously at rates that depend primarily on device implementation and cable length. SCSI is an I/O interface that may be operated over a wide range of media and transfer rates. This international standard defines a Fibre Channel mapping layer (FC-4) that uses the services defined by NCITS Project 1311D, Fibre Channel Framing and Signaling Interface (FC-FS) to transmit SCSI command, data, and status information between a SCSI initiator and a SCSI target. The use of this standard enables the transmission of standard SCSI command formats, the transmission of standard SCSI data and parameter strings, and the receipt of SCSI status and sense information across the Fibre Channel using only the standard Fibre Channel frame and sequence formats. The Fibre Channel protocol operates with Fibre Channel Classes of Service 1, 2, and 3 and operates across Fibre Channel fabrics and arbitrated loops.