HP-UX iSCSI Software Initiator Support Guide, HP-UX 11i v1 and 11i v2, July 2005

Appendix F
Glossary
Acronyms
122
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.
SA - Service Agent
SAM - System Administration Manager - an HP-UX GUI tool for system level administration.