Alternatively, high availability can be achieved with a single processor with sufficient redundancy, where fail-over is controlled by a combination of the operating system and special hardware features, such as dual disk drives.

• 另外，高可用性也可以用具有足够冗余度的单一处理器实现，在这种系统中，故障恢复是由操作系统结合专用硬件功能（如双硬件驱动器）控制的。