IBM TotalStorageFAStT900, User Manual

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trap, that identifies conditions, such as thresholds, that
exceed a predetermined value.
SRAM. See static random access memory .
SSA. See serial storage architecture .
static random access memory (SRAM). Random
access memory based on the logic circuit known as
flip-flop. It is called
static because it retains a value as
long as power is supplied, unlike dynamic random
access memory (DRAM), which must be regularly
refreshed. It is however, still volatile, meaning that it can
lose its contents when the power is switched off.
storage area network (SAN). A network that links
servers or workstations to disk arrays, tape backup
subsystems, and other devices, typically over Fibre
Channel.
storage management station. A system that is used
to manage the storage subsystem. A storage
management station does not need to be attached to
the storage subsystem through the fibre-channel I/O
path.
subnet. An interconnected but independent segment
of a network that is identified by its Internet Protocol (IP)
address.
super video graphics array (SVGA). A video display
standard that Video Electronics Standards Association
(VESA) created to provide high resolution color display
on IBM PC compatible personal computers. The
resolution is 800 x 600 4-bit pixels. Each pixel can
therefore be one of 16 colors.
SVGA. See super video graphics array .
sweep method. A method of sending SNMP requests
for information to all the devices on a subnet by sending
the request to every device on the network. Sweeping
an entire network can take a half an hour or more. If
broadcast is disabled, the recommended method is to
enter the individual IP addresses of the SAN devices
into the SANavigator tool. This method produces good
results without unnecessarily using time to wait for
responses from every IP address in the subnet,
especially for IP addresses where no devices are
present. There might, however, be times when a full
subnet sweep will produce valuable diagnostic
information about the network or a device’s
configuration.
switch. A Fibre Channel device that provides full
bandwidth per port and high-speed routing of data by
using link-level addressing.
switch group. A switch and the collection of devices
connected to it that are not in other groups. Switch
Groups are discovered by the SANavigator tool and
displayed with a gray background on the Physical and
Data Path Maps.
system name. Device name assigned by the vendor’s
third-party software.
TCP. See Transmission Control Protocol .
TCP/IP. See Transmission Control Protocol/Internet
Protocol .
terminate and stay resident program (TSR
program).
A program that installs part of itself as an
extension of DOS when it is executed.
TFT. See thin-film transistor .
thin-film transistor (TFT). A transistor created by
using thin film methodology.
topology. The physical or logical arrangement of
devices on a network. The three Fibre Channel
topologies are fabric, arbitrated loop, and point-to-point.
The default topology for the disk array is arbitrated loop.
TL_Ports. See translated loop port .
translated loop ports (TL_Ports). Each TL_Port
connects to a private loop and allows connectivity
between the private loop devices and
off loop devices
(devices not connected to that particular TL_Port).
Transmission Control Protocol (TCP). A
communication protocol used in the Internet and in any
network that follows the Internet Engineering Task Force
(IETF) standards for internetwork protocol. TCP
provides a reliable host-to-host protocol between hosts
in packed-switched communication networks and in
interconnected systems of such networks. It uses the
Internet Protocol (IP) as the underlying protocol.
Transmission Control Protocol/Internet Protocol
(TCP/IP).
A set of communication protocols that
provide peer-to-peer connectivity functions for both local
and wide-area networks.
trap. In the Simple Network Management Protocol
(SNMP), a message sent by a managed node (agent
function) to a management station to report an
exception condition.
trap recipient. Receiver of a forwarded SNMP trap.
Specifically, a trap receiver is defined by an IP address
and port to which traps are sent. Presumably, the actual
recipient is a software application running at the IP
address and listening to the port.
TSR program. See terminate and stay resident
program .
user action events. Actions that the user takes, such
as changes in the SAN, changed settings, and so on.
Each such action is considered a User Action Event.
vendor. Property value that the SANavigator tool uses
to launch third-party software. Vendor property might be
discovered but will always remain editable.
Glossary
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