NonStop System Glossary

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) or see encapsulating security payload (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 Event Viewer for OSM or TSM
on the system console and event server and summary server processes on the 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.
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