NonStop S-Series Server Description Manual (G06.24+)

Glossary
HP NonStop S-Series Server Description Manual—520331-003
Glossary-113
vertical tetrahedron
vertical tetrahedron. A topology of HP NonStop™ S-series servers in which the ServerNet
connections among the layers of a cluster switch group form a tetrahedron. See also
tetrahedron, tetrahedral topology, and cluster switch layer.
virtual file system. In UNIX and Open System Services (OSS), a file system that allows
files of a fileset to be distributed across several physical devices.
volt (V). The standard unit of measure of the potential difference that is required to move an
electric charge.
volume. A logical disk, which can be one or two magnetic disk drives or one side of an
optical disk cartridge. In HP NonStop™ S-series systems, volumes have names that
begin with a dollar sign ($), such as $DATA. See also mirrored disk or volume and
optical disk volume.
WAN. See wide area network (WAN).
WANBoot process. A process provided as part of the wide area network (WAN) subsystem
that implements the BOOTP protocol and provides management functions to the WAN
subsystem and the WAN products.
WAN concentrator. See ServerNet wide area network (SWAN) concentrator and ServerNet
wide area network (SWAN) 2 concentrator.
WAN shared driver. A driver, provided as part of the wide area network (WAN) subsystem,
that provides a simplified interface to HP NonStop™ TCP/IP for use by I/O processes.
The shared driver interface is similar to that provided by DOIOPLEASE on earlier
systems.
WAN subsystem. See wide area network (WAN) subsystem.
WAN subsystem manager process. A process named $ZZWAN provided as part of the
wide area network (WAN) subsystem that starts and manages the WAN subsystem
objects, the WAN product process, and device objects. Subsystem Control Facility
(SCF) commands are directed to the WAN subsystem manager process for configuring
and managing the WAN subsystem and the ServerNet wide area network (SWAN)
concentrator.
WAN Wizard Pro. A graphical user interface (GUI) that guides you step-by-step through the
configuration of wide area network (WAN) and local area network (LAN) software and
hardware.
wide area network (WAN). A network that operates over a larger geographical area than a
local area network (LAN)—typically, an area with a radius greater than one kilometer.
The elements of a WAN may be separated by distances great enough to require
telephone communications.