An emulated tape library is a type of storage system that functions by emulating the characteristics of a physical tape library using disk drives. This technology allows for the creation of virtual tapes that can be stored, moved, and accessed like physical tapes. There are several synonyms for emulated tape library, including virtual tape library (VTL), disk-based tape emulation (DBTE), and virtual tape system (VTS). These terms are often used interchangeably and refer to the same concept of using disk drives to create virtual tapes. Emulated tape libraries offer many benefits over physical tape libraries, including faster backup and recovery times, increased reliability, and reduced storage costs.