NonStop S-Series Hardware Installation and FastPath Guide (G06.25+)

Glossary
HP NonStop S-Series Hardware Installation and FastPath Guide—529443-001
Glossary-32
error correction code (ECC)
error correction code (ECC). A coding system that incorporates extra parity bits in order to
detect errors.
error number. For the Subsystem Programmatic Interface (SPI), a value that can be
assigned to a return token or to the last field of an error token to identify an error that
occurred. SPI defines a small set of error numbers, but most error numbers are defined
by subsystems.
ESD kit. See electrostatic discharge (ESD) protection kit.
ESP. See expansion service processor (ESP).
ESS. See Enterprise Storage System (ESS).
essential firmware. Code in memory that is necessary for power-up initialization and
communication with a host or device. Contrast with nonessential firmware.
Ethernet. A local area network (LAN) that uses the carrier sense multiple access with
collision detection (CSMA/CD) access method on a bus topology and is the basis for
the IEEE 802.3 standard.
Ethernet 4 ServerNet adapter (E4SA). A ServerNet adapter for Ethernet local area
networks (LANs) that contains four Ethernet ports.
Ethernet hub. A multiport repeater typically supporting 10Base-T cabling. Most hubs are
connectors for 8 or 12 cables. Also referred to as a concentrator.
Event Management Service (EMS). A Distributed Systems Management (DSM) product
that provides event collection, event logging, and event distribution facilities. EMS
provides different event descriptions for interactive and programmatic interfaces, lets
an operator or an application select specific event-message data, and allows for
flexible distribution of event messages within a system or network.
event message. Text intended for a system operator that describes a change in some
condition in the system or network, whether minor or serious. The change of condition
is called an event. Events can be operational errors, notifications of limits exceeded,
requests for actions needed, and so on. See also operator message.
Event Viewer Server Manager. A persistent process that routes messages and data
between the OSM or TSM Event Viewer on the system console and event server and
summary server processes on the HP NonStop™ server. An event server process
retrieves events. A summary server is a persistent process that maintains a summary
of all the events in a specified log file.
exact point. See memory-exact point and register-exact point.
exception handler. A section of program code to which control is transferred when an
exception occurs. The exception handler then determines what action should be taken.