The SDLT 110/220GB tape drive provides backward-read compatibility with DLT Type IV media written by DLT1, DLT 20/40, DLT 35/70, and DLT 40/80 tape drives. This feature provides the ultimate level of investment protection for customers seeking read compatibility with their current inventory of DLT-based data backups, while providing for an easy transition to SDLT-based data protection solutions.