Abstract

Although RAID (Redundant Array of Inexpensive Disk) technology has been widely used in HDD (Hard Disk Drive) array in the past several years, optical array just begins its steps using optical drive with higher data transfer rate and faster seeking operation¹. Optical drive (especially CD-ROM) have improved sustain transfer rate by several times, and some special designed optical drives can reduce seek time near to HDD. These progresses make it possible that low cost optical array become outside memory of video server in Video-on-Demand¹,²,³ system instead of expensive HDD array. A new kind of RAID form can reduce distance between different data segments. So this new data strategy reduce the seeking time too, which make optical array can be accessed by more users simultaneously than before.

© 1996 Optical Society of America