Overland Storage SnapSAN S1000 User Manual page 121

SnapSAN S1000 User Guide
Initiators and targets have IP addresses, just like any other network entity. They are also
identified using an iSCSI name, called the iSCSI Qualified Name (IQN). The IQN should be
unique world-wide. It is made up of a number of components, specifying the date, identifying
the vendor in reverse format, and then uniquely identifying the initiator or target. An
example of an IQN is:
iqn.2001-04.com.example:storage:diskarray-sn-123456789
Since these IQNs are rather unwieldy, initiators and targets also use short, user friendly
names (sometimes called alias names or just aliases).
iSCSI
Short for Internet SCSI. iSCSI is an IP-based storage networking standard for linking data
storage facilities, developed by the Internet Engineering Task Force (IETF). By carrying
SCSI commands over IP networks, iSCSI is used to facilitate data transfers over intranets
and to manage storage over long distances. The iSCSI protocol is among the key technologies
expected to help bring about rapid development of the storage area network (SAN) market,
by increasing the capabilities and performance of storage data transmission. Because of the
ubiquity of IP networks, iSCSI can be used to transmit data over local area networks (LANs),
wide area networks (WANs), or the Internet and can enable location-independent data
storage and retrieval.
iSNS Server
Short for Internet Storage Name Service Server. A protocol enabling the automatic discovery,
configuration, and management of iSCSI devices on a TCP/IP network.
LACP
Link Aggregation Control Protocol provides a method to control the bundling of several
physical ports together to form a single logical channel. LACP allows a network device to
negotiate an automatic bundling of links by sending LACP packets to the peer (directly
connected device that also implements LACP).
LAN
Short for Local Area Network. A network connecting computers in a relatively small area
such as a building.
LED
Short for Light-Emitting Diode. An LED is a type of diode that emits light when current
passes through it. Visible LEDs are used as indicator lights on electronic devices.
Logical Drive
A drive that is defined or created from regions of an array, a whole array, or a combination of
regions of different arrays. The logical drive appears as a single disk to one or more host
systems.
Logical Drive Availability
To accommodate hosts with multiple ports and multiple host systems, it is possible to
restrict a logical drive's availability to a particular HBA or controller port. Access can be
enabled or disabled for each host port of each controller.
LUN
Short for Logical Unit Number. A SCSI or Fibre Channel device identifier. LUN is a
subdivision of a SCSI target.
10400310-003 01/2013
©2010-13 Overland Storage, Inc.
Glossary
GL-6
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