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GL–16 Glossary
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 Compaq 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.
striping The technique used to divide data into segments, also called chunks. The
segments are striped, or distributed, across members of the stripeset. This
technique helps to distribute hot spots across the array of physical devices to
prevent hot spots and hot disks.
Each stripeset member receives an equal share of the I/O request load,
improving performance.