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Guides
VTL
A Virtual Tape Library represents an array of disk drives which are used in the same way as tape storage was used in the past for backing up a company's computer data. Now, instead of using real tape, information is backed up to virtual tapes (or disk storage). With high speed communication links for transferring large quantities of data at high speed, it is possible to have disk arrays off-site thus fulfilling the disaster recovery criteria of having duplicate data storage at a distance from the primary storage. However, many companies also prefer to have a secondary back-up to tape for disaster recovery purposes. The main advantage of a virtual tape library is access speed which is much higher than restoring from tape and so the tendency has become to back up more frequently which is important for fast moving environments.
 
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