Since the data stored in VOD system is a kind of video stream, we can use an improved RAID5 technology to improve the efficiency of data reconstructing operation in disk failure.

由于在VOD系统中存放的数据都是一些视频流，我们分析了一种改进的RAID5技术——基于奇偶校验数据重构恢复的数据节点阵列RAID5。