HP StorageWorks Tru64 UNIX Kit V3.0B for Enterprise Virtual Array Installation and Configuration Guide (AA-RUGPB-TE, October 2003)

Glossary
44 Tru64 UNIX Kit V3.0B for Enterprise Virtual Array Installation and Configuration Guide
StorageWorks
The HP name used to describe the set of rack-mounted enclosures containing controllers,
transceivers, I/O modules, EMUs, disk drives, cables, blowers, and power supplies used to
design and configure a solution-specific storage system.
switch
An electromechanical device that initiates an action or completes a circuit.
TB
Terabyte. A term defining either:
■ A data transfer rate.
■ A measure of either storage or memory capacity of 1,099,5111,627,776 (2
40
) bytes.
See also TBps.
TBps
Terabytes per second. A data transfer rate of 1,000,000,000,000 (10
12
) bytes per second.
uninitialized system
A state in which the storage system is not ready for use.
See also initialization.
virtual disk
A simulated disk drive created by the controllers as storage for one or more hosts. The
virtual disk characteristics, chosen by the storage administrator, provide a specific
combination of capacity, availability, performance, and accessibility. A controller pair
simulates the characteristics of the virtual disk by deploying the disk group from which the
virtual disk was created.
The host computer sees the virtual disk as “real,” with the characteristics of an identical
physical disk.
See also active virtual disk, virtual disk copy, virtual disk family, and virtual disk
snapshot.
virtual disk copy
A clone or exact replica of another virtual disk at a particular point in time. Only an active
virtual disk can be copied. A copy immediately becomes the active disk of its own virtual
disk family.
See also active virtual disk, virtual disk family, and virtual disk snapshot.