SCF Reference Manual for the Storage Subsystem (G06.24+, H06.03+)

Glossary

SCF Reference Manual for the Storage Subsystem—529937-007

Glossary-12

SNDA

SNDA. See ServerNet device adapter (ServerNet/DA).

state. In SCF, 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 Management Foundation (SMF). A subsystem used by the storage subsystem

that facilitates automation of storage management tasks by providing location-

independent naming, storage pools, and virtual disks on HP NonStop S-series

systems.

storage subsystem. A subsystem of the HP NonStop operating system that handles

configuration and management of disk and tape devices in G-series RVUs.

storage subsystem manager process. The generic process that starts and manages disk

and tape drives. The $ZZSTO storage subsystem manager process is started and

managed by the $ZZKRN Kernel subsystem manager process through the $ZPM

persistence manager process.

SUB option. In some Subsystem Control Facility (SCF) subsystems, the designation that

the object name given in a command stands not just for itself, but for the names of all

objects at the next-lower level in the hierarchy. The given object name can stand both

for itself and for the subordinate objects, or it can stand only for the subordinate

objects, depending on the value of the SUB option.

subordinate objects. In Subsystem Control Facility (SCF), objects that are logically

subordinate to other objects. Some subsystems are structured hierarchically, with

objects of one type logically subordinate to (that is, controlled by) an object of another

type. For example, a number of subdevices can be configured on a single line. Some

SCF commands include a SUB option that refers to subordinate objects.

substate. Further information about the state of a device. The state and substate together

provide information about the current condition of a device or path to a device.

SUBSYS object type. The Subsystem Control Facility (SCF) object type for most

subsystems that use SCF as the user interface.

subsystem. 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.