Specifications

Glossary
958 Fabric OS Version 3.1.x/4.1.x Reference Guide
Firmware Download
Loading firmware down from a server into a switch.
Firmware
The basic operating system provided with the hardware.
FL_Port
Fabric Loop Port. A port that is able to transmit under fabric protocol and also has arbitrated loop
capabilities. Can be used to connect an NL_Port to a switch.
See also F_Port, Fx_Port.
Flash Partition
Two redundant usable areas, called “partitions,” into which firmware can be downloaded in the
StorageWorks Core switch.
Flash
Programmable NVRAM memory that maintains its contents.
FLOGI
Fabric Login. The process by which an N_Port determines whether a fabric is present, and if so,
exchanges service parameters with it.
See also PLOGI.
Frame
The Fibre Channel structure used to transmit data between ports. Consists of a start-of-frame
delimiter, header, any optional headers, the data payload, a cyclic redundancy check (CRC), and an
end-of-frame delimiter. There are two types of frames: Link control frames (transmission
acknowledgements, etc.) and data frames.
See also Data Word.
FRU
Field Replaceable Unit. A component that can be replaced on site.
FS_ACC
Fibre Channel Services Accept. The information unit used to indicate acceptance of a request for a
Fibre Channel service.
FS_IU
Fibre Channel Services Information Unit. An information unit that has been defined by a Fibre
Channel service.