Seagate Fibre Channel Interface - Manual (Page 402)

388 Fibre Channel Interface Manual, Rev. D
Spectral width
1. FWHM (Full Width Half Maximum) The absolute difference between the wavelengths at which the spectral
radiant intensity is 50 percent of the maximum power. This form is typically used for LED optical sources.
2. RMS The weighted root mean square width of the optical spectrum. See FOTP-127. This form is typically
used for laser optical sources.
SRSB
Sequence recipient status block.
SSB
Sequence status block.
Status
A single byte returned by the device server to the application client in its response to indicate the completion
and completion state of a command.
STP
Shielded twisted pair.
Streamed sequence
A new Class 1 or Class 2 sequence initiated before receiving the final acknowledgement for the previous
sequence in the same exchange. Any new Class 3 sequence initiated before the expiration of R_A_TOV for all
data frames in the previous sequence.
Subblock
A upper level construct which contains partial application data for a single information category (see block). A
collection of subblocks for a given information category may be specified for transfer within a single sequence.
SW
Short wavelength.
Synchronization
Receiver identification of a transmission word boundary.
Tag
The initiator-specified component of the task identifier.
Target
A SCSI device that receives SCSI commands and directs such commands to one or more logical units for exe-
cution.
Target identifier
Address of up to 64 bits by which a target is identified.
Task
An object within the logical unit representing the work associated with a command or group of linked com-
mands.