IP
(Internet Protocol) The network layer for the
TCP/IP protocol suite widely used on Ethernet
networks.
IP address
(Internet Protocol address) A numerical label
assigned to each device (such as a computer,
printer, or Nexsan storage unit) on a computer
network that uses TCP/IP for communication.
IPMI
(Intelligent Platform Management Interface) The
IPMI interface allows you to perform
administrative tasks to remotely manage the in
the event that you are unable to connect to the
using a conventional method: through E-Centre™
or from the nxadmin CLI.
IQN
(iSCSI qualified name) Unique identifier of a
device in an iSCSI network. iSCSI uses the form
iqn.date.authority:uniqueid for IQNs. For
example, iqn.1999-02.com.nexsan:<site
name>:<pool name>:<unique ID>. This name
indicates that this is an iSCSI device from
Nexsan, which was registered as a company in
February of 1999. The naming authority is simply
the DNS name of the company reversed; in this
case, com.nexsan. Following this is the site
name, the storage pool name where the target
exists, and a user-defined unique ID to identify
the target.
iSCSI
(Internet Small Computer System Interface) A
transport protocol that provides for the SCSI
protocol to be carried over a TCP/IP network.
iSCSI Target
A storage system end-point on the that
processes iSCSI commands and I/O requests
from an initiator. Each storage pool on the can
have one, or multiple, iSCSI targets, with a
maximum of 256 targets per storage pool (0 to
255). In turn, each target can have a maximum of
256 LUNs (0 to 255). Each target on the is
identified by a unique addressing method (IQN).
iSCSI Target public alias
This is a symbolic name that you can assign to a
target on the . The public alias is seen by some
iSCSI initiators; it can help you identify the
target. The public alias for a storage pool’s
default target—that is, the target that the creates
for a storage pool when you first add a LUN to
the storage pool—is the pool name. You can
change a target’s public alias at any time.
iSNS
(Internet Storage Name Service) Protocol
designed to facilitate the automated discovery,
management, and configuration of iSCSI
devices on a TCP/IP network. You can configure
iSCSI targets to use an iSNS server.
L
LAN
(Local area network) A computer network that
links devices within a small geographic area,
such as a building or group of adjacent buildings.
LDAP
(Lightweight Directory Access Protocol). LDAP
is a protocol used to communicate with a
directory service. It defines operations to refer to
an entity in the directory, to describe the
attributes of an entity, and the security features
that can be used to authenticate to the directory
and control access to the entities within the
directory. The protocol is carried directly over
TCP for connection-oriented transport (receipt of
data is acknowledged) and User Datagram
Protocol (UDP) for connectionless transport (no
acknowledgment upon sending or receiving
data).
LED
(Light Emitting Diode) LEDs are used for
indicator lights on the front and back of Nexsan
storage units.
LUN
A LUN is a term used to describe a block of
storage on the . Uniquely numbered, this creates
what is referred to as a Logical Unit Number, or
Glossary
Nexsan Unity Hardware Reference Guide
www.nexsan.com
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