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Departmental Switch Models DS-16B and DS-8B Web Tools User Guide
g-7
Glossary
Gbps Gigabits (1,062,500,000 bits) per second.
GBps
Gigabytes (1,062,500,000 bytes) per second.
H
Half-duplex Mode of communication that allows a port to either transmit or
receive frames, but not both at once. The only exception is link control
frames, which can be transmitted at any time. See also Full-duplex.
Hard address The AL_PA that an NL_Port attempts to acquire during loop
initialization.
HBA Host Bus Adapter. Interface card between a server or workstation bus
and the fibre channel network. Similar to a network interface card.
Hub Fibre channel wiring concentrator that collapses loop topology into
physical star topology. Nodes are automatically added when active
and removed when inactive.
I
Idle Continuous transmission of an ordered set when no data is being
transmitted to maintain an active fibre channel link and bit, byte, and
word synchronization. See also Fill word.
Initiator Server or workstation that initiates communications with storage
devices over a fibre channel network. See also Targ et .
IOD In Order Delivery. A parameter that, when set, guarantees that frames
are delivered in-order if possible, and dropped if not.
ISL Interswitch Link. Fibre channel link from the E_Port of one switch to
E_Port of another. Used to connect equipment ports to fabric in loop
configuration through FL_Port. See also E_Port, Cascade.
IU Information Unit. An individual set of information as defined by
higher level process protocol definition, or upper-level protocol
mapping.
J
JBOD Just a Bunch Of Disks. A number of disks connected in a single
chassis to one or more controllers. See also RAID.