Primitive Signals Custom Made For Arbitrated Loop Topologies - Seagate 77767496 Product Manual

Start-of-frame Initiate Class 3 (SOFi3)
SOFi3 indicates the beginning of the first frame of a sequence of frames (an exchange). (This includes all sin-
gle frame sequences, commands, link services, transfer readys, and response frames.) SOFi3 is also used in
the first data frame of a sequence.
Start-of-frame Normal Class 3 (SOFn3)
SOFn3 indicates the beginning of any frame other than the first frame of an exchange (see SOFi3 above).
Start-of-frame Initialize Loop (SOFil)
SOFil is the same as SOFi3, but is renamed for use in Loop Initialization to remove the class of service distinc-
tion from the initialization process.
End-of-frame Normal (EOFn)
EOFn indicates the end of any frame other than the last frame of an exchange or sequence.
End-of-frame Terminate (EOFt)
EOFt marks the end of the last frame of all sequences. It can also indicate the end of the last frame of an
exchange. For example, the single frame sequences, commands, link services, transfer readys, and response
frames.
5.4.1.2

Primitive signals custom made for arbitrated loop topologies

There are eight primitive signals used exclusively within arbitrated loop (FC-AL) topologies. These primitives
are listed in Table 5 and defined in text following the table.
Table 5: FC-AL primitive signals
FC-AL primitive signal
Arbitrate
Arbitrate (F0)
Open full-duplex
Open half-duplex
Open broadcast replicate
Open selective replicate
Close
Dynamic Half Duplex
Mark
Arbitrate (ARBx)
ARBx is transmitted to request access to the loop. Each ARBx contains the Physical (port) Address (AL_PA) of
the requestor.
Arbitrate (ARB(F0))
ARB(F0) is transmitted to manage access fairness (see Section 8.3.1 on page 47). It is also used to assign a
loop master during initialization.
18
Beginning
running
Signal disparity
ARBx Negative
ARB(F0) Negative
OPNyx Negative
OPNyy Negative
OPNfr Negative
OPNyr Negative
CLS Negative
DHD Negative
MRKtx Negative
Ordered set (FC-1)
K28.5 D20.4 AL_PA AL_PA
K28.5 D20.4 D16.7 D16.7
K28.5 D17.4 AL_PD AL_PS
K28.5 D17.4 AL_PD AL_PD
K28.5 D17.4 D31.7 D31.7
K28.5 D17.4 AL_PD D31.7
K28.5 D5.4 D21.5 D21.5
K28.5 D10.4 D21.5 D21.5
K28.5 D31.2 MK_TP AL_PS
Fibre Channel Interface Manual, Rev. D
Ordered set (hex)
BC 94 AL_PA AL_PA
BC 94 F0 F0
BC 91 AL_PD AL_PS
BC 91 AL_PD AL_PD
BC 91 FF FF
BC 91 AL_PD FF
BC 85 B5 B5
BC 8A B5 B5
BC 5F MK_TP AL_PS