HP 3000 Enterprise Virtual Array - Manual (Page 205)

205 Enterprise Virtual Array 3000 User Guide
glossary
Glossary
Glossary
This glossary defines Enterprise Virtual Array terms used in this publication or
related to this product and is not a comprehensive glossary of computer terms.
µm
A symbol for micrometer; one millionth of a meter. For example, 50 µm is equivalent to
0.000050 m.
3U
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 unit.
active member of a virtual disk family
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, and snapshot.
adapter
See controller.
AL_PA
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.