Virtual TapeServer SCSI-to-FC Adapter User Manual

GL-8
Glossary
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 VT5900-SA 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.
small formfactor
transceiver (SFF)
A physical component that manages the functions of the FC-0
layer, which is the physical characteristic of the media and
interface, including drivers, transceivers, connectors, and cables.
Mounts on a FC adapter card and connects the VT5900-SA to a
FC host.
shortwave Lasers or LEDs that emit light with wavelengths around 780 nm
or 850 nm. When using multimode fibre (50 nm), shortwave
lasers can be used with FC links less than 500m. To achieve
longer lengths, single-mode fibre is required. The preferred fibre
core size is 50 micron as this fibre has large bandwidth so that
the distance is limited by the fibre attenuation. A 62.5 micron
core size is also supported for compatibility with existing FDDI
installations. Fibre of this type has smaller bandwidth and, in this
case, the distance is limited by the fibre bandwidth.
SNMP Simple Network Management Protocol.
speed A status type in the FC Status Menu showing the speed (1063
Mbps) of the FC adapter.
switched fabric A FC term describing a switched topology, which is one of the
three existing FC topologies. Fabric elements interconnect
various N_Ports or NL_Ports and are responsible for frame
routing.