IBM 2145-8F4 Installation Manual page 133

uninterruptible power supply contains a power sensor to monitor the
supply and a battery to provide power until an orderly shutdown of the
system can be performed.
V
valid configuration
A configuration that is supported.
VDisk See virtual disk.
virtual disk (VDisk)
In SAN Volume Controller, a device that host systems attached to the
storage area network (SAN) recognize as a Small Computer System
Interface (SCSI) disk.
virtualization
In the storage industry, a concept in which a pool of storage is created that
contains several disk subsystems. The subsystems can be from various
vendors. The pool can be split into virtual disks that are visible to the host
systems that use them.
virtualized storage
Physical storage that has virtualization techniques applied to it by a
virtualization engine.
W
worldwide node name (WWNN)
An identifier for an object that is globally unique. WWNNs are used by
Fibre Channel and other standards.
worldwide port name (WWPN)
A unique 64-bit identifier associated with a fibre-channel adapter port. The
WWPN is assigned in an implementation- and protocol-independent
manner.
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Glossary