HP StorageWorks HSG60 and HSG80 Array Controller and Array Controller Software Command Line Interface Reference Guide (EK-G80CL-RA. C01, March 2005)

Glossary
324 HP StorageWorks HSG60 and HSG80 Array Controller and Array Controller Software
Command Line Interface Reference Guide
I/O operation
The process of requesting a transfer of data from a peripheral device to memory (or visa
versa), the actual transfer of the data, and the processing and overlaying activity to make the
request and transfer occur.
initiator
A SCSI device that requests an I/O process to be performed by another SCSI device,
namely, the SCSI target. The controller is the initiator on the device bus. The host is the
initiator on the host bus.
instance code
A 4-byte value displayed in most text error messages and issued by the controller a
subsystem error occurs. The instance code indicates during software processing the error
was detected.
interface
A set of protocols used between components, such as cables, connectors, and signal levels.
IPI
Intelligent Peripheral Interface. An ANSI standard for controlling peripheral devices by a
host computer.
IPI-3 Disk
Intelligent Peripheral Interface Level 3 for Disk.
IPI-3 Tape
Intelligent Peripheral Interface Level 3 for Tape.
JBOD
Just a bunch of disks. A term used to describe a group of single-device logical units not
configured into any other container type.
kernel
The most privileged processor access mode.
L_Port
A node or fabric port capable of performing Arbitrated Loop functions and protocols.
NL_Ports and FL_Ports are loop-capable ports.
link
A connection between two Fibre Channel ports consisting of a transmit fibre and a receive
fibre.