Glossary
Nexsan E60™/Nexsan E48™
FRU Removal and Replacement Guide
Nexsan
www.nexsan.com
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intended for connecting storage subsystems or
devices to hosts.
SFP
Small Form-factor Pluggable. A type of gigabit
interface converter (GBIC) in a compact form
factor. The Fiber Channel ports or 10Gb iSCSI
ports on Nexsan storage devices are SFPs.
SSD
Solid State Disk. A high-performance storage
device that contains no moving parts.
storage area network
An architecture that provides for attachment of
remote computer storage devices to servers in
such a way that the devices appear as locally
attached to the operating system.
T
TB
Terabyte. Approximately one trillion
(1,000,000,000,000) bytes. Used to describe the
storage capacity of hard disk drives. A terabyte
is usually computed as 1012
(1,000,000,000,000) bytes, but can also be
computed as 240 (1,099,511,627,776) bytes
(often called a “binary terabyte” and abbreviated
TiB).
TCP/IP
Transmission Control Protocol/Internet Protocol.
The set of communications protocols used for
the Internet and other similar networks. TCP
provides reliable delivery of messages between
networked computers. IP uses numeric IP
addresses to join network segments.
U
U
Unit. The standard unit of measure for
designating the vertical usable space, or height,
of racks. 1U is equal to 1.75 inches. A device
that is described as being 1U in height may be
shorter than 1.75 inches, but, due to the design
of most racks, will still take up 1.75 inches of
rack space.
W
WAN
See wide area network.
wide area network
A telecommunication network that covers a
broad area or that links across metropolitan,
regional, or national boundaries. Wide area
networks are used to connect local area
networks and other types of networks together,
so that users and computers in one location can
communicate with users and computers in other
locations.