Glossary–6
Hitachi Unified Storage Hardware Service Guide
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Full-duplex
Transmission of data in two directions simultaneously. For example, a
telephone is a full-duplex device because both parties can talk at the
same time.
G
Gbps
Gigabit per second.
Gigabit Ethernet
A version of Ethernet that supports data transfer speeds of 1 gigabit
per second. The cables and equipment are very similar to previous
Ethernet standards.
GUI
Graphical user interface.
H
HA
High availability.
Half-duplex
Transmission of data in just one direction at a time. For example, a
walkie-talkie is a half-duplex device because only one party can talk at
a time.
HBA
See Host bus adapter.
Host
A server connected to the storage system via Fibre Channel or iSCSI
ports.
Host bus adapter
An I/O adapter located between the host computer's bus and the Fibre
Channel loop that manages the transfer of information between the two
channels. To minimize the impact on host processor performance, the
host bus adapter performs many low-level interface functions
automatically or with minimal processor involvement.
Host I/O Module
I/O Module for the CBL/CBLD. The Host I/O Module provides interface
functions for the host.
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