本标准规定了通过PCI Express传输的信息，以支持服务交付系统SAM-5所需的服务。SCSI系列标准提供了许多不同的传输协议，这些协议定义了不同SCSI设备之间交换信息的规则。本标准定义了使用PCI Express队列层在SCSI设备之间交换信息的规则。其他SCSI传输协议标准定义了使用其他互连在SCSI设备之间交换信息的规则。 本标准未定义PCI Express拓扑结构的配置，也未定义通过PCI Express传输发送和接收这些消息的机制。

This standard specifies the information to be transported across PCI Express to support the services required by SAM-5 of a service delivery system.The SCSI family of standards provides for many different transport protocols that define the rules for exchanging information between different SCSI devices. This standard defines the rules for exchanging information between SCSI devices using a PCI Express queuing layer. Other SCSI transport protocol standards define the rules for exchanging information between SCSI devices using other interconnects.This standard does not define the configuration of the PCI Express topology or the mechanisms for sending and receiving these messages across the PCI Express transport.