Connect SCSI Tape Library to Backup Server

A.

The correct answer is A. SCSI cable.

When upgrading the backup server from a single tape drive to a SCSI tape library, the administrator will need a SCSI cable to connect the tape library to the server. SCSI (Small Computer System Interface) is a type of interface used to connect devices such as tape libraries, hard drives, and other peripherals to a computer system.

The SCSI tape library typically has multiple SCSI ports, and the administrator will need to connect one of these ports to a SCSI adapter on the backup server. The SCSI adapter is typically built into the server's motherboard or may be a separate expansion card that can be installed in an available slot.

Before connecting the SCSI cable, the administrator should make sure that the SCSI termination settings are correct. SCSI devices use termination to prevent signal reflections that can cause data errors. The SCSI tape library should be terminated at the last port in the SCSI chain, and the backup server should be terminated at the second-to-last port. If the server has a built-in SCSI adapter, it may already be terminated, but if using an expansion card, the administrator will need to install a SCSI termination card on the server.

Option B is incorrect because SCSI interface adapters are already built into the tape library and don't need to be separately installed.

Option C is incorrect because SCSI termination cards are only needed if the server's SCSI adapter doesn't have built-in termination.

Option D is incorrect because iSCSI (Internet Small Computer System Interface) is a completely different type of interface used for remote storage access over a network, and not used for connecting tape libraries directly to servers.