Abstract: Embodiments of the present invention facilitate implementing external storage systems using commodity computer components to achieve high performance and reliability. An exemplary method facilitates dynamic repairing of disk failures for RAID1 storage coherently across a plurality of loosely coupled storage controller computers via message communications through network interfaces. An exemplary method facilitates snapshot function coherently across a plurality of loosely coupled storage controller nodes via message communications through network interfaces. An exemplary method facilitates to detect, tolerate, and repair temporary target device failures in a networked storage system. An exemplary target device may contain a plurality of disk devices, and a temporary target device failure may due to many reasons such as a network or software glitch.

Abstract: Embodiments of the present invention facilitate implementing external storage systems using commodity computer components to achieve high performance and reliability. An exemplary method facilitates dynamic repairing of disk failures for RAID1 storage coherently across a plurality of loosely coupled storage controller computers via message communications through network interfaces. An exemplary method facilitates snapshot function coherently across a plurality of loosely coupled storage controller nodes via message communications through network interfaces. An exemplary method facilitates to detect, tolerate, and repair temporary target device failures in a networked storage system. An exemplary target device may contain a plurality of disk devices, and a temporary target device failure may due to many reasons such as a network or software glitch.