The virtual tapelibraries emulate industry-standard-based physical tape drives and libraries, presenting themselves as tape to all of the common backup software applications.
虚拟磁带库模拟基于工业标准的物理磁带机和磁带库，让它们自己以磁带形式面对所有常见的备份软件。
2
Since the tapelibraries have very poor random access performance, it is critical to study random I/O scheduling strategies and algorithms in order to improve the performance of tape library.
由于磁带库随机存取的性能很差，需要研究有效的随机I/O调度策略和算法以改善其在线存取的效率。
3
The backup system in digital libraries will be a combining pattern of traditional tape databases, D2D and VTL.