Specifications

GL–11
Compaq HSG80 Array Controller ACS Version 8.4 Configuration and CLI Reference Guide
I/O interface See interface.
I/O module A 16-bit SBB shelf device that integrates the SBB shelf with either an 8-bit single
ended, 16-bit single-ended, or 16-bit differential SCSI bus.
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 both of those happen.
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.
kernel The most privileged processor access mode.
LBN Logical Block Number.
L_port A node or fabric port capable of performing arbitrated loop functions and
protocols. NL_Ports and FL_Ports are loop-capable ports.
LED Light Emitting Diode.
link A connection between two Fibre Channel ports consisting of a transmit fibre and a
receive fibre.
logical block number
See LBN.
local connection A connection to the subsystem using either its serial maintenance port or the
host’s SCSI bus. A local connection enables you to connect to one subsystem
controller within the physical range of the serial or host SCSI cable.