Either performing P2V migrations or building virtualized backups from scratch, it's almost impossible to preserve the initial backup infrastructure. Backup software running in VMs cannot communicate with tape hardware because guest virtual machines don’t have direct access to tape drives and tape autoloaders. Thus, there's no way to perform backups without serious changes being applied to the backup infrastructure.
StarWind has made the Tape Redirector a part of StarWind Virtual SAN functionality. In order to continue successful work with tape backup software and hardware, download the free version of StarWind Virtual SAN right now.