Treating storage as a single logical entity without regard to the hierarchy of physical media that may be involved or that may change. It enables the applications to read from and write to a single pool of storage rather then individual disks, tapes and optical devices. Also called "file virtualization," it allows excess capacity on a server to be shared, and it can make migration from one file server to another transparent to the applications. See HSM
, storage management
Not Necessarily "Virtual Storage"
Storage virtualization deals with a pool of storage devices. The term "virtual storage" may refer to storage virtualization; however, it is also an alternate term for "virtual memory," which is employed by every desktop operating system to expand the computer's main memory (see virtual memory