This paper designs an implement scheme for a Double-Harddisk Physical separate Card, detailed introduces the physical principle, the structure of hardware and the design of control software of the Card which is based on PCI bus.

• 摘要设计了一种双硬盘物理隔离卡的实现方案，详细介绍了基于PCI总线的物理隔离卡的隔离原理、硬件组成及控制程序的设计。