HP Ultrium Tape Drive manual Point-to-point connection between itself and the fabric, Is LUN1

fibre channel	Fibre Channel provides an inexpensive yet expendable means of quickly
	transferring data between workstations, mainframes, supercomputers, desktop
	computers, storage devices, displays and other peripherals. Although it is called
	Fibre Channel, its architecture represents neither a channel nor a real network
	topology. It allows for an active intelligent interconnection scheme, called a fabric,
	to connect devices. All a Fibre Channel port has to do is to manage a simple
	point-to-point connection between itself and the fabric.
	Several common ULPs (Upper Level Protocols) including IP and SCSI can run on
	Fibre Channel, merging high-speed I/O and network functionality in a single
	connectivity technology.
filemark	A mark written by the host to the tape that can be searched for, often using the
	drive’s fast-search capability. It does not necessarily separate files. It is up to the
	host to assign a meaning to the mark.
immediate mode	A mode of responding to SCSI commands where the drive or other peripheral
	does not wait until the command has finished before returning status information
	back to the host. For writing filemarks, Immediate mode can significantly improve
	the performance of systems that do not set the Immediate bit when sending a SCSI
	WRITE FILEMARKS command. On the other hand, data is not flushed to tape in
	response to a filemark command.
infinite flush	By default, the buffer in the drive is flushed every 5 seconds. Infinite flush avoids
	frequent starting and stopping of the mechanism when using a very slow
	application. It also avoids losing capacity through the flushing of partly written
	groups. On the other hand, infinite flush means that data can remain in the buffer
	for very long periods of time, and could be lost in the event of a power failure.
LUN	Logical Unit Number. A unique number by which a device is identified on the SCSI
	bus. A tape drive has a fixed LUN of 0. In an autoloader, the changer mechanism
	is LUN1.
SAN	Storage Area Network. A dedicated, high-speed network that establishes a direct
	connection between storage elements and servers. The hardware that connects
	workstations and servers to storage devices in a SAN is referred to as a fabric. The
	SAN fabric enables any-server-to-any-storage device connectivity through the use
	of Fibre Channel switching technology.
SCSI	Small Computer System Interface—a standard command specification and
	command set that enables computers and peripherals to communicate with each
	other. HP’s Ultrium drives adhere to the SCSI-3 specification and support all
	features required by that standard.

36 Glossary