HP StorageWorks HSG60 and HSG80 Array Controller and Array Controller Software Maintenance and Service Guide (EK-G80MS-SA. C01, March 2005)

Glossary
274 HP StorageWorks HSG60 and HSG80 Array Controller and Array Controller Software
Maintenance and Service Guide
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 array controller to replace failed members of a
storageset.
storage array
An integrated set of storage devices.
storage array subsystem
See storage subsystem.
storage subsystem
The array 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. See also
container.
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.
stripe
The data divided into blocks and written across two or more member disks in an array.
striped mirrorset
See RAID 0+1.
stripeset
See RAID-0.
tape
A storage device supporting sequential access to variable sized data records.
target
(1) A SCSI device that performs an operation requested by an initiator. (2) Designates the target
identification (ID) number of the device.