Glossary
Quantum TC2201 User’s Guide 143
SCSI bus
The means of transferring SCSI data between SCSI devices. It
is an 8-bit or 16-bit bus that supports up to eight or sixteen devices
(including itself), in any mix of initiators and targets, with the limitation
that at least one initiator and one target must be present.
SCSI device A single unit on the SCSI bus, identifiable by a unique SCSI
address. A SCSI device can act as an initiator or target. For SCSI-3, each
SCSI device supports up to sixteen LUNs.
SCSI port An opening at the back of the TC2201 providing connection
between the SCSI adapter and the SCSI bus.
SCSI status A menu name used to show the number of SCSI devices on
the bus.
Synch and Steering Layer A function of iSCSI Fixed Interval Markers
(FIMs) used for synchronization and steering of iSCSI Protocol Data Units
(PDUs) especially in regards to high-speed iSCSI implementations.
T
TCP Transmission Control Protocol
Target A device (usually a peripheral) that responds to an operation
requested by an initiator (usually a host system). Peripherals are targets,
but for some commands (for example, a SCSI COPY command), the
peripheral may need to act temporarily as an initiator.
Terminator Block/Termination An electrical connection at each end of the
SCSI bus composed of a set of resistors (or possibly other components).
Its function is to provide a pull-up for open collector drivers on the bus,
and also impedance matching to prevent signal reflections at the ends of
the cable.
The SCSI bus requires termination at both ends of the bus. One end of the
SCSI bus is terminated by the SCSI adapter’s internal termination. The
other end should have a terminator placed on the SCSI connector on the
last SCSI peripheral. If this device is not terminated, data errors may
occur.
Topology The physical or logical layout of nodes on a network. FC
topologies include Point-to-Point, FC-AL, and Fabric.
Trap In the context of SNMP, an unsolicited message sent by an agent to
a management station. The purpose is to notify the management station
of some unusual event.
V
View Node Name A status type in the FC Status Menu showing the
identification of the node.
