StorageTek 9840 Bedienungsanleitung PDF herunterladen (Seite 227)

95741 Sixth Edition Glossary-3

Glossary

enterprise A representation of the goals,

organizational structure, business processes,

and information resources and requirements

of an enterprise. (IBM)

environmental requirement Any of the

physical conditions required for the

protection and proper operation of a

functional unit; the requirement is usually

specified as a nominal value and a tolerance

range. For a device, there may be more than

one set of environmental requirements; for

example, one set for transport, another for

storage, and another for operation. (T) (A)

error A discrepancy between a computed,

observed, or measured value or condition

and the true, specified, or theoretically

correct value or condition. (I) (A)

F

F_Port A Port within the Fabric which

attaches to an N_Port through a link.

fabric The FC topology that is similar to a

telephone switch in that the initiator of a

“call” to the receiving port simply provides

the receiver with the port address, and the

fabric routes the transmission to the proper

port. A fabric differs from a point-to-point or

arbitrated loop topology in that it provides

for interconnections between ports without

having a point-to-point connection. The

fabric also serves as a media type converter.

fault symptom code (FSC) A hexadecimal

code generated by the drive for controller

microcode in response to a detected

subsystem error.

FC See Fibre Channel.

fibre channel (FC) The ANSI standard that

defines an ultra high-speed, content

independent, multi-level data transmission

interface that can support multiple protocols

simultaneously, support connectivity to

millions of devices over copper and/or fiber

optic physical media, and provides the best

characteristics of both networks and

channels, over diverse topologies.

field replaceable unit (FRU) An assembly

that is replaced in its entirety when any one

of its components fails. (IBM)

file-protect To prevent the destruction or

overwriting of data stored on cartridge tape.

See also write-protect switch.

firmware An ordered set of instructions and

data stored in a way that is functionally

independent of main storage; for example,

microprograms stored in a ROM. (T)

FL_Port An F_Port within the Fabric which

also contains the Loop Port State Machine as

defined in FC-AL-2. The FL_Port attaches to

an NL_Port through a link.

FRU See field replaceable unit.

FSC See Fault Symptom Code.

G

GB See Gigabyte.

Gb Gigabit, equal to 10

9

bits.

GBIC See Gigabit Interface Converter

gigabit (Gb) One billion (10

9

) bits.

Gigabit Interface Converter (GBIC) An

adapter that connects a fiber-optic or copper-

wire cable to a Fibre Channel hub or switch.

gigabyte (GB) One billion (10

9

) bytes.

When referring to memory capacity,

1,073,741,824 in decimal notation. (IBM)

H

hardware All or part of the physical

components of an information processing

system, such as computers or peripheral

devices. (T) (A)

HBA See host bus adaptor

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