IBM TotalStorage NAS Gateway 500, Руководство по обслуживанию

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S
SAN. See storage area network .
SCSI. See small computer system interface .
SDLC. See synchronous data link control .
server. (1) In a network, a node that provides facilities
to other stations; for example, a file server, a printer
server, a mail server.
service adapter or IP address. The adapter and IP
address used for client access; a “virtual” IP that will
failover to another adapter or node.
shielded twisted pair (STP). A cable medium
consisting of a telephone wire wrapped in a metal
sheath to eliminate external interference.
Simple Network Management Protocol (SNMP). In
the Internet suite of protocols, a network management
protocol that is used to monitor routers and attached
networks. SNMP is an application-layer protocol.
Information on devices managed is defined and stored
in the application’s Management Information Base
(MIB).
single-mode optical fiber. An optical fiber in which
only the lowest-order bound mode (which can consist of
a pair of orthogonally polarized fields) can propagate at
the wavelength of interest. Contrast with
multimode
optical fiber .
small computer system interface (SCSI). A standard
hardware interface that enables a variety of peripheral
devices to communicate with one another.
SNMP. See Simple Network Management Protocol .
storage area network (SAN). A dedicated storage
network tailored to a specific environment, combining
servers, storage products, networking products,
software, and services.
socket. In TCP/IP, the Internet address of the host
computer on which the application runs, and the port
number it uses. A TCP/IP application is identified by its
socket.
storage client network. A classic, interconnected,
fibre channel fabric with a single, fibre channel-fabric
name.
storage controller. A device (such as a RAID
controller) that creates and manages other storage
devices. The circular arrangement between storage
controllers and storage devices is due to the in-band
management techniques used by the storage
controllers.
storage device. A logical unit number (LUN) that
terminates a collection of ports on the storage network.
storage network. An arrangement that provides
shared access to a set of logical unit numbers (LUNs)
across one -
n storage client networks.
storage port. An engine’s connection point to a
storage client network. A storage port is a member of a
single fabric. See also
engine .
storage unit. Hardware that contains one or more
drive bays, power supplies, and a network interface.
Some storage units contain RAID controllers; their
storage unit is accessed by the NAS Gateway 500.
STP. See shielded twisted pair .
synchronize. Command that propagates the local
node’s definition of the cluster to all other nodes of the
cluster.
synchronous data link control (SDLC). A discipline
for managing synchronous, code-transparent,
serial-by-bit information transfer over a link connection.
Transmission exchanges may be duplex or half-duplex
over switched or nonswitched links. The configuration of
the link connection may be point-to-point, multipoint, or
loop.
synchronous data transfer. A physical transfer of
data to or from a device that has a predictable time
relationship with the execution of an I/O request.
T
tape device. A collection of tape units that share a
model type and serial number (such as all the logical
unit numbers (LUNs) of a tape library). See also
tape
unit .
tape unit. A tape device or a robotics controller that is
visible over a storage network. A tape unit is a member
of a single storage network (of 1 -
n fabrics), but can
have 1 - n equivalent paths.
target. A collection of logical units that are directly
addressable on the network. The target corresponds to
the server in a client-server model.
TB. see Terabyte .
TCP. See Transmission Control Protocol .
TCP/IP. See Transmission Control Protocol/Internet
Protocol .
teaming. The grouping of two to four ports or adapters
to increase transmission and reception throughput.
Teaming creates a single, high-speed, fault-tolerant link
that provides load balancing for both outbound and
inbound traffic.
Telnet. In the Internet suite of protocols, a protocol
that provides remote-terminal connection service. It
Glossary
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