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

Glossary
HP NonStop S-Series Server Description Manual—520331-003
Glossary-30
Epoch
Epoch. The period beginning January 1, 1970, at 0 hours, 0 minutes, and 0 seconds
Coordinated Universal Time (UTC).
EPO connector. See emergency power-off (EPO) connector.
equipment grounding conductor. The conductor used to connect the non-current-carrying
metal parts of equipment, raceways, and other enclosures to the grounding electrode
conductor at the facility’s main service entrance or at the source of a separately
derived power source.
errno. An external variable that contains the most recent error condition set by a C function.
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).
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
.