NonStop System Glossary

graphics address remapping table (GART)
The scatter-gather table used for graphics address remapping functions.
ground
A conducting connection, whether intentional or accidental, between an electrical circuit and either
the earth or some conducting body that serves in place of the earth, such as an underground metal
water pipe, structural steel, or a ground rod driven into the earth. See also earth ground.
ground fault
Any undesired current path from a point of differing potential to ground.
ground fault interrupter
A device that interrupts the electric current to the load when a fault current to ground exceeds a
predetermined value that is less than that required to operate the overcurrent protection device of
the supply circuit.
grounded
Connected to earth or to some conducting body that serves in place of the earth.
grounded conductor
A system or circuit conductor that is intentionally grounded.
grounding conductor
A conductor used to connect equipment of the grounded circuit of a wiring system to one or more
earth-grounding electrodes. See also earth-grounding electrode.
group
1. Part of the group, module, slot naming convention for uniquely identifying the logical location
of a component within a system. A group is a subset of a system and contains one or more modules.
A group does not necessarily correspond to a single physical object, such as an enclosure. For
example, a NonStop S-series processor enclosure typically includes only one group number, but
a modular cabinet can contain several enclosures that each might belong to different groups. See
also module.
2. In the Open System Services (OSS) environment, a set of user IDs with the same group ID.
group database
A database on an Expand node that contains the group name, group ID, and user names for each
group using that node.
group ID
The nonnegative integer used to identify a group of users of an Expand node. Each user of a node
is a member of at least one group. When the identity of a group is associated with an Open System
Services (OSS) process, a group ID value is referred to as one of:
• Real group ID
• Effective group ID
• Supplementary group ID
• Saved-set group ID
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