Buffer system for optical storage system

The optical storage device has been put into practical use as an ultimate high capacity, low cost per bit, removable and reliable information recording device. But it has the disadvantage of slow speed compared with magnetic disks. In order to improve the data transfer rate of the optical storage subsystem, and to enhance the overall data throughput of the system, the authors propose a new optical storage system architecture, which is a combination of an array of optical storage devices and a plurality of buffers coupled to a separate optical storage device. For scheduling of the buffer, they use the technique of the Ping-Pong buffer and the tagged elevator write back as the destage algorithm. The performance of the optical storage system is dramatically enhanced, especially for small writes.