随着信息时代的来临,世界上每时每刻都有大量的数据产生。因此有必要找到一种更加方便和有效的方式来管理这些海量的数据信息。为了解决海量信息管理中的数据存储问题,文章讨论了诸如磁带库、光盘库等三级存储设备在海量存储系统中的应用。另外,针对目前三级存储设备I/O调度算法的一些缺陷,提出了一种自适应的随机I/O调度算法来弥补这些缺点。 With the advent of the information age, a great deal of data is generated every moment in the world. Therefore, it is necessary to find a more convenient and effective way to manage these massive data information. In order to solve the problem of data storage in massive information management, this paper discusses the application of tertiary storage devices, such as tape libraries and optical disk libraries, in mass storage systems. In addition, aiming at some shortcomings of current I / O scheduling algorithms for tertiary storage devices, an adaptive random I / O scheduling algorithm is proposed to remedy these shortcomings.