HP StorageWorks HSG80 ACS Solution Software V8.8 for IBM AIX Installation and Configuration Guide (AA-RV1HA-TE, March 2005)

Glossary
252 HSG80 ACS Solution Software V8.8 for IBM AIX Installation and Configuration Guide
SCSI ID number The representation of the SCSI address that refers to one of the signal
lines numbered 0 through 15.
SCSI-P cable A 68-conductor (34 twisted-pair) cable generally used for differential
bus connections.
SCSI port (1) Software: The channel controlling communications to and from a
specific SCSI bus in the system. (2) Hardware: The name of the logical
socket at the back of the system unit to which a SCSI device is
connected.
serial
transmission
A method transmission in which each bit of information is sent
sequentially on a single channel rather than simultaneously as in
parallel transmission.
signal converter See SCSI bus signal converter.
single ended
I/O module
A 16-bit I/O module. See also I/O module.
single-ended
SCSI bus
An electrical connection where one wire carries the signal and another
wire or shield is connected to electrical ground. Each signal logic level
is determined by the voltage of a single wire in relation to ground. This
is in contrast to a differential connection where the second wire carries
an inverted signal.
spareset A collection of disk drives made ready by the controller to replace
failed members of a storageset.
storage array An integrated set of storage devices.
storage array
subsystem
See storage subsystem.
storageset (1) A group of devices configured with RAID techniques to operate as
a single container. (2) Any collection of containers, such as stripesets,
mirrorsets, striped mirrorsets, and RAIDsets.
storageset
expansion
The dynamic expansion of the storage capacity (size) of a unit. A
storage container is created in the form of a concatenation set which is
added to the existing storage set defined as a unit.
storage
subsystem
The controllers, storage devices, shelves, cables, and power supplies
used to form a mass storage subsystem.
storage unit The general term that refers to storagesets, single-disk units, and all
other storage devices that are installed in your subsystem and accessed
by the host. A storage unit can be any entity that is capable of storing
data, whether it is a physical device or a group of physical devices.