August 2016 Glossary 301
SCSI
See Small Computer System Interface.
SCSI Commands
The SCSI-3 Fibre Channel Protocol (FCP) commands issued by either the initiator or
target in an arbitrated loop topology, to perform a specific SCSI task. There is a direct
correspondence between the SCSI task and the FC exchange. A Fibre Channel
exchange can correspond directly to either a single SCSI command, or group of
linked SCSI commands.
SCSI-3
The set of SCSI commands used for Fibre Channel. SCSI-3 comes in a Generic
Packetized Protocol (SCSI-3 GPP) and Fibre Channel Protocol (SCSI-3 FCP).
SEQ_CNT
See Sequence Count.
SEQ_ID
See Sequence Identifier.
Sequence
A set of one or more frames identified as a unit within an interchange.
Sequence Count
A value in a frame header that helps the receiving port identify the order in which a
set of frames was transmitted.
Sequence Identifier
In a transmission between a pair of terminal N_Ports, the field in the Sequence
Content header portion of the Sequence Management frame that separates one
sequence from another. See SEQ_ID.
Serial Transmission
A transmission in which bits are sent in a stream in a single fiber. Contrast this with
a parallel transmission.
SFP
See small form-factor pluggable.
SILI
Suppress Illegal Length Indication
single mode fiber
Optical fiber in which only the lowest-order bound mode can propagate at the
wavelength of interest.
Small Computer System Interface
An input and output bus that supports the attachment of various devices to
operating systems. Fibre Channel uses the SCSI-3 command set.
small form-factor pluggable
Technology with 2-gigabit transfer speed over small connectors, cables, and
transceivers for larger bandwidth capability.
SOF
See Start-of-Frame Delimiter.
SOFi3
The abbreviation for Start of Frame Initiate Class 3 delimiter.
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