Research of High-Functional Disk Array System for Very Large Image Processing

大容量的二次存储系统是大图像处理的必要条件。最近，尽管硬盘系统具有高性能和可靠性，但它们趋向于更小、更便宜。我们的研究目标是提出高性能磁盘阵列的架构，利用小型硬盘，适合于大图像处理。我们提出的架构采用分层存储系统，其中磁带设备也组合在一起以保存非常大的映像，因为所有大映像数据都驻留在硬盘驱动器上是不现实的。构建了由16个数据盘、1个校验盘和1个备用盘组成的RAID磁盘阵列系统。由于每个磁盘具有600MB的容量和2.0MB /秒的数据传输速率，因此该磁盘阵列系统总共提供了近10GB的容量和30MB /秒的数据传输速率。本系统采用专门为支持磁盘阵列与SUN之间的高带宽而开发的s总线接口板连接到SUN工作站，并在系统中集成8mm磁带归档器，实现了大型图像处理系统，实现了分层存储系统中图像数据的迁移。最后，将该系统应用于大型遥感图像处理，验证了该体系结构的有效性。

Second-storage systems which have very large capacity is essential for large image processing. Recently, hard-disk systems tends to be smaller and cheaper in spite of their high performance and reliability.Our research goal is to present the architecture of the high performance disk array, by utilizing small hard-disks, which is suitable for large image processing. Our proposed architecture employs the hierachical storage system in which tape devices are also combined in order to hold very large images, since it is not realistic that all large image data is resident on hard-disk drives.We constructed the RAID disk array system which consist of 16 data disk, one parity disk and one spare disk. Since each disk has 600MB capacity and 2.0MB / sec data transfer rate, this disk array system provides in total almost 10GB capacity and 30MB / sec data transfer rate. We attach this system to SUN work station by using specialized S-bus interface board, which is developed especially in order to support high bandwidth between the disk array and SUN Then, we combined 8mm tape archivers into our system and implemented a large image processing system to migrate image data in the hierarchical storage systems. At last, we applyed our system for large remote sensing image processing and confirmed efficiency of our architecture.