HP StorageWorks 1510i Modular Smart Array iSCSI concepts and deployment guide (431338-002, July 2008)

iSCSI Node A single iSCSI initiator or iSCSI target. There are one or more iSCSI nodes within
a network entity. The iSCSI node is accessible via one or more network portals.
An iSCSI node is identified by its iSCSI name. The separation of the iSCSI name
from the addresses used by and for the iSCSI node allows multiple iSCSI nodes
to use the same address, and the same iSCSI node to use multiple addresses.
iSCSI Qualified
Name (IQN)
A name format for iSCSI. This name begins with “iqn” and the reversed dotted
domain name of the hosting service. Names should be worldwide unique.
iSCSI Target Node The "target".
iSCSI Target Name Theiqnnameofthetarget.IfgeneratedbySMUorCLIitisworldwideunique.
iSCSI Task An iSCSI request for which a response is expected.
iSCSI Transfer
Direction
The iSCSI transfer direction is defined with regard to the initiator. Outbound or
outgoing transfers are transfers from the initiator to the target, while inbound or
incoming transfers are from the target to the initiator.
Local Area
Network (LAN)
A network of interconnected devices, usually consisting of servers, switches,
routers, and storage.
Mapped LUNs /
Bound volumes
The LUNs (and their associated physical hard drives) associated with a target
that will be associated with a drive letter through all system events.
Network Entity A device or gateway that is accessible from the IP network. A network entity
must have one or more network portals, each of which can be used to gain
access to the IP network by some iSCSI nodes contained in that network entity.
Network Interface
Card (NIC)
A hardware card that plugs into a server and provides a given interface. NIC is
almost exclusively used to describe Ethernet interface cards.
Network Portal A component of a network entity that has a TCP/IP network address and that
may be used by an iSCSI node within that network entity for the connection(s)
within one of its iSCSI sessions. A network portal in an initiator is identified by
its IP address. A network portal in a target is identified by its IP address and
its listening TCP port.
Persistent target A persistent target is automatically remounted by the operating system each
time the computer is rebooted. This is generally desirable. The Microsoft iSCSI
Initiator service supports the concept of persistent targets. By using common
APIs and UI, the Microsoft iSCSI initiator service can configure software and
hardware initiators to reconnect to a target whenever the computer is rebooted.
In this way, the devices on the target are connected to the initiator at all times.
The login information needed to connect to the persistent targets (including
CHAP secrets and portals) are captured when the persistent login is done by the
administrator and saved by the software in non-volatile storage. The Microsoft
software initiator kernel mode driver will initiate reconnection as soon as the
Windows TCP/IP stack and the Microsoft iSCSI initiator service loads.
Portal Groups Aportalgroupdefines a set of network portals within an iSCSI network
entity that collectively supports the capability of coordinating a session with
connections spanning these portals. Not all network portals within a portal
group need participate in every session connected through that portal group.
One or more portal groups may provide access to an iSCSI node. Each network
portal, as utilized by a given iSCSI node, belongs to exactly one portal group
within that node.
Portal (TCP port) A number from 1 to 65536 that identifies the endpoint of a TCP connecti
on.
Well-known services typically listen at a well-known TCP port; for example,
web servers use port 80, Telnet uses port 23, and iSCSI uses port 3260. The
acronym TCP stands for Transmission Control Protocol and is the pr
otocol that
iSCSI relies on for in-order, reliable delivery of data.
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