描述磁盘驱动器的逻辑2级（设备级）接口，其物理、电气和配置特性符合ISO/IEC 9318-1。是为了促进设备级接口的开发和利用，该接口允许磁盘从属外围设备与控制器互连。补充其他智能外设接口标准。

Describes the Logical Level 2 (device level) Interface for disk drives, the physical, electrical and configuration characteristics of which are in accordance with ISO/IEC 9318-1. Is to facilitate the development and utilization of a device level interface which permits the interconnection of disk slave peripherals to a controller. Complements other Intelligent Peripheral Interface standards.