Question

Scsi devices that act as a gateway are associated with a unique logical unit number (lun)​

Answer 1

It is true.

SCSI Hard Disk Configuration (Small Computer System Interface) is designed in a way to connect multiple peripherals to the system in a scalable, high-speed manner. Many types of SCSI disk configurations and technologies are available like Parallel SCSI, Serial Attached SCSI, and iSCSI.

Some SCSI devices act as a gateway to other devices. In such cases, each device is associated with a unique Logical Unit Number (LUN).

A logical unit number (LUN) is a unique identifier for designating an individual or collection of physical or virtual storage devices that execute input/output (I/O) commands with a host computer, as defined by the Small System Computer Interface (SCSI) standard.

Parallel SCSI controllers support up to 15 devices and identify these devices with the numbers 0 - 15 The highest priority device is given the number 7, followed by 6, 5, 4, 3, 2, 1, 0, 15, 14, 13, 12, 11, 10, 9, and 8.