Bridged Tape Drives

A bridged drive provides a single, unified control and data communication path between the library/partition and the host using the SAS or FC drive interface.

A non-partitioned library requires one bridged drive. A partitioned library requires one bridged drive per partition. You select the bridged drive during library configuration.

• Code versions earlier than 2.0 support two partitions, and a maximum of two bridged drives located in the Base Module.
• Code version 2.01, and later, supports up to eight partitions and bridged drives located in designated Expansion Modules.

You must connect the bridged drive to an HBA supporting multiple LUNs (also referred to as LUN scanning). The SL150 Library uses a single SCSI ID and two logical unit numbers (LUN). LUN 0 controls the tape drive and LUN 1 which is configured as a SCSI medium changer device controls the robotics. Data is sent to the remaining LUN on the bridged drive or to LUNs on the other, unbridged drives in the partition, all of which are configured as SCSI sequential-access (tape) devices.