The EMC Disk Library for mainframe (DLm) is a Virtual Tape Library for IBM compatible mainframes. All the “tape drives” in an DLm are emulated devices where tapes are actually disk files located on backend storage. Each DLm VTE (node) is attached to an IBM compatible mainframe using FICON or ESCON channels, and typically connects to backend NAS storage using dual-channel gigabit network connections.

The EMC Disk Library for mainframe (DLm) is a Virtual Tape Library for IBM compatible mainframes. All the “tape drives” in an DLm are emulated devices where tapes are actually disk files located on backend storage. Each DLm VTE (node) is attached to an IBM compatible mainframe using FICON or ESCON channels, and typically connects to backend NAS storage using dual-channel gigabit network connections.