Specifications

Glossary GL–19
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’s 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.
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.
STORAGEWORKS A family of DIGITAL modular data storage products that allow customers to
design and configure their own storage subsystems. Components include
power, packaging, cabling, devices, controllers, and software. Customers can
integrate devices and array controllers in STORAGEWORKS enclosures to
form storage subsystems.
STORAGEWORKS systems include integrated SBBs and array controllers to
form storage subsystems. System-level enclosures to house the shelves and
standard mounting devices for SBBs are also included.
stripe The data divided into blocks and written across two or more member disks in
an array.
striped mirrorset See RAID level 0+1.
stripeset See RAID level 0.
stripe size The stripe capacity as determined by n–1 times the chunksize, where n is the
number of RAIDset members.