HP 3PAR T-Class Storage Systems - Manual (Page 470)

3PAR InForm Management Console 4.1.0 User’s Guide
470 320-200231 Rev A
U
unspecified property: When using the InForm Management Console, a property that has
been included in a template but does not have a defined value. When applying the
template, the system will either use the default value (when applicable) or calculate
the optimized setting for you.
user data: For standard base volumes, the data that is written to the user space.
user size: The amount of user space in a virtual volume, or the size of the volume as
presented to the host.
user space: The space on a virtual volume that represents the size of the virtual volume as
presented to the host. For standard base volumes, the user space holds all user
data. For thinly provisioned virtual volumes, no storage is actually allocated to user
space, so the user space represents the volume's virtual size. See also virtual size.
V
virtual copy: A snapshot, or copy-in-time, of another volume (a base volume or another
virtual copy) created using copy-on-write techniques.
virtual copy consistency group: A group of snapshots created from multiple virtual
volumes at the same time in order to ensure consistency.
virtual size: The size that the volume presents to the host. For standard base volumes, the
virtual size is equal to the user space. For thinly provisioned virtual volumes, no
storage is actually allocated to user space, so the virtual size is determined by
whatever value is assigned to the user space. See also user space.
virtual volume: A virtual storage unit created by mapping data from one or more logical
disks. See also logical disk, mapping.
VLUN: A pairing between a virtual volume and a Logical Unit Number (LUN), expressed as
either a VLUN template or an active VLUN.
VLUN template: Sets up an association between a virtual volume and a LUN-host, LUN-
port, or LUN-host-port combination by establishing the export rule, or the manner in
which the volume is exported.
VV template: Virtual volume template. The template contains a set of virtual volume
parameters that can be applied again and again to create volumes with the same
characteristics using the InForm Management Console.
W
World-Wide Name (WWN): A unique 64-bit value used to identify Fibre channel devices
on an arbitrated loop. The WWN consists of a prefix issued by the IEEE to uniquely
identify the company and a suffix that is issued by the company.
WWN: See World-Wide Name.
Z
zone: A unit of physical disk space reserved by a controller node for snapshot or snapshot
administration data. A single zone may occupy space on more than one disk.