谈到数据备份,大家都会联想到磁带备份。实际上,磁带由于它的价格相对低廉、存储容量较大、无源并可长期存放、可顺序高速读写等特点,使其很适合作为非在线的大容量存储介质使用。但存放数据的磁带介质由于存放环境或一些事故、灾害的物理原因有可能不能继续使用,在这时如果所备份的数据系统恰巧出现异常而需要恢复,则必将引起数据的丢失。因此对备份物理介质建立副本,对提高数据的可用性和可恢复性有着至关重要的作用。而这种建立副本的过程,大多数备份管理软件称之为磁带克隆或简单称呼为克隆,通过克隆,建立数据备份的副本放 When it comes to data backup, we all think of tape backup. In fact, because of its relatively low price tape, large storage capacity, passive and long-term storage, high-speed sequential read and write and other characteristics, making it very suitable as a non-online mass storage media use. However, due to storage environment or some accidental storage of data, the disaster may not be able to continue to use the physical reasons of the disaster. At this time, if the backup data system happens to be abnormal and needs to be recovered, it will inevitably cause data loss. Therefore, the establishment of a copy of the backup physical media, to improve data availability and recoverability has a crucial role. And this process of creating a copy, most of the backup management software called tape cloning or simply called cloning, cloning, the establishment of data backup copy