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Glossary
Quantum TC2201 User’s Guide 141
L
l
Link For Fibre Channel, it is a connection between two nodes, each
having at least one N_Port (or the other end could be an F-Port),
interconnected by a pair of optical or copper links, one inbound and one
outbound.
LUN Logical Unit Number or Logical Unit; a subdivision of a SCSI
target. For SCSI-2, each SCSI target supports up to sixteen LUNs (LUN-0
to LUN-15). Using LUNs, the iSCSI host can address multiple peripheral
devices that may share a common controller.
LVD/SE Low Voltage Differential/Single-Ended
M
Management Information Base (MIB) A structured set of data variables,
called objects, in which each variable represents some resource to be
managed. A related collection of resources to be managed.
Mapping Table A table which is indexed by sequential LUN values,
indicating selected BUS:TARGET:LUN devices. It is used by the TC2201
to perform Fibre Channel-to-SCSI operations by default.
MB megabyte. (There are 8 bits in a byte.)
MIB See Management Information Base.
Motherboard The main PCA of the TC2201 that provides a physical and
logical connection between Fibre Channel and SCSI devices.
Multiplexer A device that allows two or more signals to be transmitted
simultaneously on a single channel.
O
Offline Taking the TC2201 offline indicates that all SCSI and iSCSI
adapters in the TC2201 are offline.
Taking a SCSI adapter offline means ending inputs/outputs and
suspending all transactions going from the TC2201 to the specified SCSI
devices. The SCSI adapter is no longer active or available for access.
Taking a iSCSI adapter offline means ending inputs/outputs and
suspending all transactions going from the TC2201 to the specified iSCSI
device.
Online For the TC2201, online indicates that at least one adapter in the
TC2201 is active and available for access.
For a SCSI adapter, online indicates the SCSI adapter is active and
available for access and input/output processing.