Glossary - HP StorageWorks 6400/8400 - Enterprise Virtual Array User Manual

Glossary

This glossary defines terms used in this guide or related to this product and is not a comprehensive
glossary of computer terms.
µm
3U
active member of
a virtual disk
family
adapter
AL_PA
allocation policy
ambient
temperature
ANSI
arbitrated loop
A symbol for micrometer; one millionth of a meter. For example, 50 µm is
equivalent to 0.000050 m.
A unit of measurement representing three "U" spaces. "U" spacing is used to
designate panel or enclosure heights. Three "U" spaces is equivalent to 5.25
inches (133 mm).
See also rack-mounting
An active member of a virtual disk family is a simulated disk drive created by
the controllers as storage for one or more hosts. An active member of a virtual
disk family is accessible by one or more hosts for normal storage. An active
virtual disk member and its snapshot, if one exists, constitute a virtual disk family.
An active member of a virtual disk family is the only necessary member of a
virtual disk family.
See also virtual disk,virtual disk copy,virtual disk family,
See controller.
Arbitrated Loop Physical Address. A 1-byte value the arbitrated loop topology
uses to identify the loop ports. This value becomes the last byte of the address
identifier for each public port on the loop.
Storage system rules that govern how virtual disks are created. Allocate
Completely and Allocate on Demand are the two rules used in creating virtual
disks.
• Allocate Completely—The space a virtual disk requires on the physical disks
is reserved, even if the virtual disk is not currently using the space.
• Allocate on Demand—The space a virtual disk requires on the physical disks
is not reserved until needed.
The air temperature in the area where a system is installed. Also called intake
temperature or room temperature.
American National Standards Institute. A non-governmental organization that
develops standards (such as SCSI I/O interface standards and Fibre Channel
interface standards) used voluntarily by many manufacturers within the United
States.
A Fibre Channel topology that links multiple ports (up to 126) together on a
single shared simplex media. Transmissions can only occur between a single
pair of nodes at any given time. Arbitration is the scheme that determines which
node has control of the loop at any given moment
HP StorageWorks 6400/8400 Enterprise Virtual Array user guide
unit.
and snapshot.
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