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

Glossary
Open SCSI Integrator’s Manual for NonStop Servers—422988-002
Glossary-10
indicator lights
indicator lights. Two lights on a customer-replaceable unit (CRU) that indicate the status of
the unit. The red or amber indicator light is lit when the unit is not working properly;
during startup, this light can indicate that the unit is not yet functioning. The green
indicator light is lit when the unit has proper power applied. See also light-emitting
diode (LED).
input/output process (IOP). A running program (part of the operating system) that manages
the I/O functions for one or more ServerNet addressable controllers (SACs) of the same
type.
installer. The person who installs the system equipment for a new system. This person also
installs new equipment when additions are made to the system. This person can install
software and perform system verification procedures as directed by the system planner,
configuration planner, or support planner.
intelligent SCSI processor (ISP). The ServerNet addressable controller (SAC) that controls
the SCSI bus.
International Organization for Standardization (ISO). A worldwide federation of national
standards bodies established to promote the development of standards, such as network
communications standards, to facilitate the international exchange of goods and
services, and to develop mutual cooperation in areas of intellectual, scientific,
technological, and economic activity.
Internet address. The 32-bit address assigned to hosts that want to participate in the Internet
using Transmission Control Protocol over Internet Protocol (TCP/IP). Internet addresses
are an abstraction of physical hardware addresses, just as the Internet is an abstraction of
physical networks. As assigned to the interconnection of a host to a physical network, an
Internet address consists of a network portion and a host portion. See also IP address
.
Internet protocol (IP). A data communications protocol that handles the routing of data
through a network, which typically consists of many different subnetworks. IP is
connectionless; it routes data from a source address to a destination address. See also IP
address.
interprocessor communications (IPC). The exchange of messages between processors.
I/O cabinet. See I/O enclosure
.
I/O enclosure. A Himalaya S-series system enclosure containing exactly one module, which
includes ServerNet adapters, disk drives, components related to the ServerNet system
area network (ServerNet SAN), and components related to electrical power and cooling
for the enclosure. An I/O enclosure is identical to a processor enclosure, except that it
contains I/O multifunction (IOMF) customer-replaceable units (CRUs) instead of
processor multifunction (PMF) CRUs.
IOMF CRU. See I/O multifunction (IOMF) CRU
.
I/O multifunction (IOMF) CRU. A Himalaya S-series customer-replaceable unit (CRU) that
contains a power supply, a service processor, a ServerNet router, an Ethernet controller,