Open SCSI Integrator's Manual for NonStop S-Series Servers

Glossary
Open SCSI Integrator’s Manual for NonStop Servers—422988-002
Glossary-7
EMI
EMI. See electromagnetic interference (EMI).
EMS collector. An Event Management Service (EMS) process to which subsystems report
events.
enclosure. Similar to a cabinet in Himalaya K-series systems. An enclosure can contain
components of a system or a peripheral. Base enclosures are placed on the floor and can
have other enclosures stacked on top of them. Stackable enclosures can be placed on top
of other enclosures. See also system enclosure
and peripheral enclosure.
enclosure interleaving. On Himalaya S-series systems, configuring a mirrored disk volume
to use two separate system enclosures. For internal disk drives, the two disk drives of
the mirrored volume can be in separate enclosures. For external disk drives, the
adapters connected to the two disk drives of the mirrored volume can be in separate
enclosures.
EPO. See emergency power-off (EPO) connector
.
ESD kit. See electrostatic discharge (ESD) protection kit
.
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 10BaseT cabling. Most hubs are
connectors for 8 or 12 cables. Also referred to as a concentrator.
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
.
extent. A contiguous area on disk for allocating one file.
extent size. The size in bytes of a contiguous area on disk for allocating one file.
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 system area network (ServerNet SAN); for example, the X
fabric.
ffan. A component within a Himalaya S-series system enclosure that circulates air into the
enclosure to help maintain optimal temperature. Each Himalaya S-series system
enclosure contains two fans.
Fast Ethernet ServerNet adapter (FESA). A single-port ServerNet adapter that supports
100-megabit per second (Mbps) and 10-Mbps Ethernet data transfer rates on a Himalaya
S-series server. The FESA installs directly into an existing Ethernet port, and one FESA
is supported per system enclosure.