HP-UX iSCSI Software Initiator Support Guide (Edition 7)

Supported - A feature in a release for which implementation and testing for that release have been
completed.
Target Address - consists of three components, the IP address of the network portal the target uses,
its TCP port number, and its target portal group tag.
Transport Driver - A protocol specific layer combining aspects of the iSCSI Adaption Layer and
the iSCSI Transport Layer, which defines a transport technique for SCSI block IO.
Unsupported - A feature in a release for which implementation and testing of that feature is
incomplete, or a feature in a release that has been declared “unsupported” by Hewlett-Packard.
User Agent - A process working on the user’s behalf to establish contact with some service. The
UA retrieves service information from the Service Agents or Directory Agents.
F.2 Acronyms
CHAP - Challenge-Handshake Authentication Protocol - A technique to authenticate initiators and
targets.
DA - Directory Agent - an SLP component.
Fibre Channel - an encapsulation protocol used primarily for SCSI on HP-UX.
GigE - Gigabit Ethernet - an ethernet network that functions at Gigabit speeds.
HA - High Availability - a configuration component designed to maximize hardware and software
availability through various component fail-over techniques.
HBA - Host Bus Adapter - a computer hardware component that provides outside connectivity from
a computer system using a specific protocol across an internal bus.
HP-UX - HP-Unix - HP version of the UNIX Operating System.
IETF - Internet Engineering Task Force - a standards preparation group.
IP - Internet Protocol - a network transmission protocol.
IPSec - Internet Protocol Security - an internet protocol security system.
iSCSI - SCSI over IP - an IETF encapsulation protocol for use of SCSI block IO over an IP network.
ISID - Initiator Session Identifier - The iSCSI session identifier defined on the host. See the iSCSI
specification for further details.
KRS - Kernel Registry Services - An HP-UX kernel specific mechanism that facilitates the maintenance
of structured data. Subsystems wihtin the kernel can use KRS to maintain data. This data can either
be volatile, or persistent, across system reboots.
LU - Logical Unit - as defined in SAM-2: an end device such as a stand-alone disk or tape, or a
piece of logical storage in a disk array.
LUN - Logical Unit Number - as defined in SAM-2: the path to a LU, or the 64-bit address of the
LU.
LVM - Logical Volume Manager - HP-UX software subsystem for volume management.
NAS - Network Access Server - Operates as a client of a RADIUS server. This is the host which
runs the “iradd” daemon.
OLA/R/D - OLA (Online Addition), OLR (Online Replacement), OLD (Online Deletion), and OLAR
(Online Addition and Replacement) - the HP-UX ability to add, delete, or replace a PCI/PCI-X HBA
while the system remains up and running.
PCI - Peripheral Component Interconnect - a system IO bus widely used in computer systems; the
IO bus standard for new HP servers.
PCI-X - Peripheral Component Interconnect Extended - the follow-on higher speed version of PCI.
pSCSI - parallel SCSI - transport layer support for SCSI parallel busses.
PVLinks - Physical Volume Links - an HP-UX component of LVM that permits the fail-over from a
primary path to a LU to an alternate path to the LU.
RADIUS - Remote Authentication Dial In User Service - A RADIUS server is used in CHAP
authentication of initiators and targets.
F.2 Acronyms 61