Storing video data with high speed access in hierarchical storage systems

This paper describes a high speed media access from a hierarchical storage system consisting of disks and auxiliary storage media. Generally, the storage system to store video data has slow access time. Especially, if the auxiliary storage media consists of tapes, the storage system has too long access time due to the handling time between disks and tapes even though they are controlled under the storage system. In this paper, we proposed to replace the tapes with DVD, so that the access time of the storage system consisted of disks and DVDs are shorter than that in the disks and tapes. The key of this paper is to further reduce the DVD access time by means of data compression of video data on the DVD with almost the same access time of the disk. As a result, this storage system becomes a large volume disk even though this consists of the disk and the DVD.