What is characteristic of a virtual tape library?

A.
Uses disk drives as backup media

B.
Requires changes on the backup software

C.
A virtual tape cannot span multiple LUNs

D.
Uses a special mechanism to address the ‘shoe-shining’ effect

Explanation:

Virtual Tape Library

A virtual tape library (VTL) has the same components as that of a physical tape library, except that
the majority of the components are presented as virtual resources. For the backup software, there
is no difference between a physical tape library and a virtual tape library.
Virtual tape libraries use disks as backup media.
Emulation software has a database with a list of virtual tapes, and each virtual tape is assigned
space on a LUN. A virtual tape can span multiple LUNs if required. File system awareness is not
required while backing up because the virtual tape solution typically uses raw devices.