IBM TotalStorage NAS Gateway 500 Service Manual Download

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object and their access rights; for example, a list
associated with a file might identify users who can
access the file and their access rights to that file.

accessory.

An IBM designation for a separately

orderable part that (a) has no type number, (b) is for
purchase only, and (c) does not receive normal IBM
maintenance.

ACL.

See

access control list

adapter load balancing.

The ability of several

adapters in a team to be active simultaneously, with the
outbound-traffic load balanced across all the adapters in
the team; spreading tasks among adapters improves
performance by preventing uneven distribution of
workload. If one adapter in the team fails, the outbound
traffic is redistributed across the remaining active
adapters in the team. See also

teaming

assigned disk.

A disk that is mapped to a logical

drive.

asynchronous.

A class of data-transmission service

whereby all requests for service contend for a pool of
dynamically allocated ring bandwidth and response
time.

attach.

To make a device a part of a network logically.

Contrast with

connect

attachment.

A port or a pair of ports, optionally

including an associated optical bypass, that are
managed as a functional unit. A dual attachment
includes two ports: a port A and a port B. A single
attachment consists of one port: port S.

attention (ATTN).

An occurrence external to an

operation that could cause an interruption of the
operation.

ATTN.

See

attention

bandwidth.

The capacity of a communications line or

processor, normally expressed in bits per second (bps)
or transactions per seconds (tps).

baseband LAN.

A local area network in which data is

encoded and transmitted without modulation of a carrier
(T).

Basic Input/Output System (BIOS).

The personal

computer code that controls basic hardware operations,
such as interactions with diskette drives, hard disk
drives, and the keyboard.

BIOS.

See

Basic Input/Output System

bits per second (bps).

The rate at which bits are

transmitted per second. Contrast with

baud

boot IP address.

The IP address on which an

Ethernet adapter boots prior to being assigned a service
IP address.

bps.

See

bits per second.

buffer.

See

buffer storage

buffer storage.

(1) A special-purpose storage or

storage area allowing, through temporary storage, the
data transfer between two functional units having
different transfer characteristics. A buffer storage is used
between non-synchronized devices, a serial and a
parallel device, or between devices having different
transfer rates. (2) In word processing, a temporary
storage in which text is held for processing or
communication (T).

bus.

See

data bus

cache.

A high-speed buffer storage that contains

frequently accessed instructions and data to reduce
access time.

carrier sense multiple access with collision
detection (CSMA/CD).

A class of medium access

procedures that allows multiple stations to access the
medium at will, without explicit prior coordination, and
avoids contention by way of carrier sense and
deference. Contention is resolved by way of collision
detection and transmission.

cascade.

To connect in a series or in a succession of

stages so that each stage derives from or acts upon the
product of the preceding stage.

cascading resource group.

A resource group in

which takeover priority is assigned to each configured
node in the cluster such that ownership preferences is
given to the highest priority node. Cascading resource
groups exist only on one node at a time.

CIFS.

See

Common Internet File System.

client.

A computer system or process that requests

access to the data, services, or resources of a server
(another computer system or process). Multiple clients
may share access to a common server.

client-server model.

A common way to describe

network services and the model user processes
(programs) of those services. Need input. 1) We aren’t
defining

client/server

, which might have these

definitions:

1) Pertaining to the model of interaction in

distributed data processing in which a program at one
site sends a request to a program at another site and
awaits a response. The requesting program is called a
client; the answering program is called a server and 2)
The relationship between machines in a
communications network. The client is the requesting

Glossary

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