HP NonStop G-Series - Manual (Page 282)

E
EMU
(Environmental
Monitoring Unit) An element which monitors the status of an enclosure, including the power, air temperature,
and blower status. The EMU detects problems and displays and reports these conditions to a
user and the controller. In some cases, the EMU implements corrective action.
enclosure A single sheet-metal structure and its enclosed set of system components.
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.
Event
Management
Service (EMS) A Distributed Systems Management (DSM) product that is used to provide 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 The 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 forth.
Event Management Service (EMS) formatted events can be viewed by the OSM Event Viewer .
Expand network The HP NonStop™ operating system network that extends the concept of fault-tolerant operation
to networks of geographically distributed HP NonStop™ systems. If the network is properly
designed, communication paths are constantly available even if a single line failure or component
failure occurs.
external ServerNet
X or Y fabric The X or Y fabric that links systems in a ServerNet cluster.
external fabric
connection The low-level ServerNet connection between a node and one of the external ServerNet fabrics.
Each node has an X and a Y connection to the external fabrics.
external ServerNet
fabrics The fabrics that link systems in a ServerNet cluster.
F
fabric A complex set of interconnections through which there can be multiple and (to the user) unknown
paths from point to point. The term fabric is used to refer to the X or Y portion of the ServerNet
communications network; for example, the X fabric.
See also internal ServerNet fabric and external ServerNet fabric .
Fast Ethernet
ServerNet adapter
(FESA) A single-ported ServerNet adapter that supports 100-megabit/second (Mbps) or 10-Mbps
Ethernet data transfer rates on an HP NonStop S-series server.
Fiber Optic
Extension (FOX) Refers to two products, FOX II and ServerNet/FX, which allow you to create high-speed (up to
4 megabytes/second) networks of as many as 14 systems connected by dual fiber-optic cables.
Fiber-optic
ServerNet cable A ServerNet cable that uses fiber optics to transmit data. HP NonStop™ servers support two
types of fiber-optic ServerNet cables: multi-mode fiber-optic (MMF) ServerNet cable and
single-mode fiber-optic (SMF) ServerNet cable.
Fibre Channel TA data transfer architecture designed for mass storage devices and other peripheral devices
that require very high bandwidth.
Fibre Channel disk
module (FCDM) A unit that holds storage system devices such as disk drives, power supplies, blowers, I/O
modules, transceivers, or EMUs
Fibre Channel
Arbitrated
Loop(FC-AL) The American National Standards Institute’s (ANSI) document which specifies arbitrated loop
topology operation.
282 Glossary