Chi Corporation

Virtual Tape Libraries
A Virtual Tape Library (VTL) is a data storage virtualization technology for backup and recovery purposes. A VTL presents a storage component as tape libraries or tape drives for use with existing backup software.Virtualizing the disk storage as tape allows for easy integration with existing backup software and existing backup and recovery processes and policies. The benefits of such virtualization include storage consolidation and faster data restore processes.

Most current VTL solutions use PATA or SATA disk arrays as the primary storage component due to their relatively low cost. The use of array enclosures increases the scalability of the solution by allowing the addition of more disk drives and enclosures to increase the storage capacity.

The shift to VTL also eliminates streaming problems that often impair efficiency in tape drives as disk technology does not rely on streaming and can write effectively regardless of data transfer speeds.

By backing up data to disks instead of tapes, VTL often increases performance of both backup and recovery operations. Restore processes are found to be faster than backup regardless of implementations. In some cases, the data stored on the VTL's disk array is exported to other media, such as tapes, for disaster recovery purposes (scheme called disk-to-disk-to-tape, or D2D2T).
 

Virtual Tape Library (VTL)

Falconstor VTL

Virtual Tape Library

 

REO 9500D

Overland REO Series

 

Exagrid

Quantum

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