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

Glossary
333HP StorageWorks HSG60 and HSG80 Array Controller and Array Controller Software
Command Line Interface Reference Guide
SCSI-A cable
A 50-conductor (25 twisted-pair) cable generally used for single-ended, SCSI-bus
connections.
SCSI-P cable
A 68-conductor (34 twisted-pair) cable generally used for differential bus connections.
selective storage presentation
Selective Storage presentation is a feature of the HSG80 controller that enables the user to
control the allocation of storage space and shared access to storage across multiple hosts.
This is also known as “Restricting Host Access.”
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.
service rate
The rate at which an entity is able to service requests. For example, the rate at which an
Arbitrated Loop is able to service arbitrated requests.
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 used by the controller to replace failed members of a storageset.
star coupler
The physical hub of the CI cluster subsystem cabling. The star coupler is a set of connection
panels contained within a cabinet containing cable connections and transformers through
which the nodes of a cluster connect to one another through the CI bus. See also node and
CI bus.
storage array
An integrated set of storage devices.
storage array subsystem
See storage subsystem