本标准规定了SCSI块命令-2（SBC-2）命令的功能要求 设置SBC-2允许SCSI块逻辑单元（如硬磁盘）连接到计算机，并提供 它们使用的定义。该标准与SCSI块命令（SBC）命令保持高度兼容性 ANSI INCITS 306-1998中的set，虽然提供了附加功能，但并不要求进行更改 当前安装的设备或现有软件。

This standard specifies the functional requirements for the SCSI Block Commands - 2 (SBC-2) command set. SBC-2 permits SCSI block logical units such as rigid disks to attach to computers and provides the definition for their use.This standard maintains a high degree of compatibility with the SCSI Block Commands (SBC) command set, ANSI INCITS 306-1998, and while providing additional functions, is not intended to require changes to presently installed devices or existing software.