EMC Connectrix DS-32B2 and ED-12000B Fabric OS Reference Manual g-11
Glossary
Gateway Hardware that connects incompatible networks by providing
translation for both hardware and software. For example, an ATM
gateway can be used to connect a Fibre Channel link to an ATM
connection.
GBIC Gigabit interface converter. A removable serial transceiver module
that allows gigabaud physical level transport for Fibre Channel and
Gigabit Ethernet. GBIC and SFP terms are used interchangeably
throughout the documentation, although they are different types of
optics and the hardware is not interchangeable. See also SFP.
Gb/s Gigabits per second (1,062,500,000 bits/second).
GB/s GigaBytes per second (1,062,500,000 bytes/second).
H
Half Duplex A mode of communication that allows a port to either transmit or
receive frames at any time, but not simultaneously (with the
exception of link control frames, which can be transmitted at any
time). See also Full Duplex.
HBA Host bus adapter. The interface card between a server or workstation
bus and the Fibre Channel network.
High Availability An attribute of equipment that identifies it as being capable of
conducting customer operations well in excess of 99% of the time.
Typically, high availability is identified by the number of nines in that
percentage. Five nines means the equipment is rated as being capable
of conducting customer operations 99.999% of the time without
failure.
Host A computer that accesses storage devices over the fabric. May also be
referred to as a server. See also Workstation.
Hot Pluggable A FRU capability that indicates it may be extracted or installed while
customer data is otherwise flowing in the chassis.
Hub A Fibre Channel wiring concentrator that collapses a loop topology
into a physical star topology. Nodes are automatically added to the
loop when active and removed when inactive.