虚拟带库的产品和解决方案就是着眼于这个问题而推出的。
The products of virtual tape library and its solved scheme are presented in order to solve the problem.
本文主要介绍虚拟带库解决方案的工作原理、适用环境以及几个主流厂商的产品，以便更多的读者了解这种新技术。
The paper mainly introduced the working principle, adaptive environment and products of some major firms of the virtual tape base in order to make the readers know more the new technique.
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