近两年来,随着存储在企业信息化应用中地位的提升,可以简化管理大型、复杂、异构存储环境的虚拟存储技术逐渐成为业界热点。美国的StorageTek公司很早就推出了Lceberg虚拟磁盘的虚拟存储技术,随后,IBM公司通过虚拟磁带将虚拟存储的概念实施到磁带库上,昆腾等公司也都提出了自己的“虚拟技术”。然而,面对众多的虚拟技术,人们仍旧存在不少迷惑——虚拟存储到底“虚拟”了什么?广泛宣传的各种虚拟技术有多少真正可以实施了?虚拟存储到底是一种美好的前景还是一种 In the recent two years, with the promotion of the status of storage in enterprise information application, the virtual storage technology that can simplify and manage large-scale, complex and heterogeneous storage environments has gradually become a hot spot in the industry. StorageTek in the United States introduced the virtual storage technology of Lceberg virtual disk very early on. Later, IBM implemented the concept of virtual storage on the tape library via virtual tape. Companies such as Quantum also proposed their own “virtualization technology.” However, there are still many confusion in the face of numerous virtual technologies - what is “virtual” virtual storage in the end? How many virtual technologies widely advertised can really be implemented? Is virtual storage a bright future? A