Open SCSI Integrator's Manual for NonStop S-Series Servers

Glossary
Open SCSI Integrator’s Manual for NonStop Servers—422988-002
Glossary-24
state
state. In Subsystem Control Facility (SCF) subsystems, one of the generally defined possible
conditions of an object with respect to the management of that object. Examples of
states are DEFINED, STARTED, and STOPPED.
storage subsystem. A subsystem of the NonStop operating system that handles configuration
and management of disk and tape devices in G-series RVUs.
subnet. See subnetwork
.
subnetwork. A physical network within an Internet protocol (IP) network. Each IP network
can be divided into a number of subnetworks. Within a given network, each subnetwork
is treated as a separate network. Outside the network, the subnetworks appear as part of
a single network. The terms subnetwork and subnet are used interchangeably.
subnetwork address. An extension of the Internet protocol (IP) addressing scheme that
allows a site to use a single IP address for multiple physical networks. A subnetwork
address is created by dividing the local part of an IP address into a subnetwork number
(identifying a particular subnetwork) and a host number (uniquely identifying the host
system within the subnetwork). The terms subnetwork address and subnet address are
used interchangeably.
subsystem. (1) A secondary or subordinate system, usually capable of operating
independently of or asynchronously with a controlling system. (2) A program or set of
processes that manages a cohesive set of Subsystem Control Facility (SCF) objects.
Each subsystem has a manager through which applications can request services by
issuing commands defined by that subsystem. See also subsystem manager
.
Subsystem Control Facility (SCF). An interactive interface for configuring, controlling, and
collecting information from its subsystems.
subsystem manager. A process that performs configuration and management functions for a
Subsystem Control Facility (SCF) subsystem.
subvolume. A group of related files stored on a disk; all the files have the same volume and
subvolume name, but each file has a unique file identifier.
super group. The group of user IDs that have 255 as the group number. This group has
special privileges; many utilities for the NonStop server have commands or functions
that can be executed only by a member of the super group.
super-group user. A user who can read, write, execute, and purge most files on the system.
Super-group users have user IDs that have 255 as the group number.
super ID. A privileged user who can read, write, execute, and purge all files on the system. In
the Guardian environment, the super ID has the user ID 255,255.
SWAN concentrator. See ServerNet wide area network (SWAN) concentrator
.
SWAN manager task (SMT). A manager task that is provided as part of the wide area
network (WAN) subsystem. The SMT runs in each communications line interface