2 basic accept (ba_acc), Basic accept (ba_acc) – Seagate Fibre Channel Interface User Manual
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Fibre Channel Interface Manual, Rev. D
9.1.2
Basic Accept (BA_ACC)
BA_ACC is sent by the drive in response to all correctly structured ABTS. If the ABTS identifies an exchange in
execution or buffered for execution, the drive will discard the exchange.
The R_CTL is 84h.
Field definitions (listed alphabetically)
Highest SEQ_CNT (Highest Sequence Count)
FFFFh.
Last SEQ_ID (Last Sequence Identifier)
Not used.
Lowest SEQ_CNT (Lowest Sequence Count)
0.
OX_ID Aborted (Originator Exchange Identifier Aborted)
The same value as received in the ABTS.
RX_ID Aborted (Responder Identifier Aborted)
FFFFh.
SEQ_ID Valid (Sequence Identifier Valid)
00h
Marks the Last SEQ_ID field as invalid. The SEQ_ID is not used because the error recovery procedure requires the
entire exchange (command) to be aborted.
Table 19:
BA_ACC Payload
Bit
Byte
7
6
5
4
3
2
1
0
0
SEQ_ID Valid
1
Last SEQ_ID
2
(MSB)
Reserved
3
(LSB)
4
(MSB)
OX_ID Aborted
5
(LSB)
6
(MSB)
RX_ID Aborted
7
(LSB)
8
(MSB)
Lowest SEQ_CNT
9
(LSB)
10
(MSB)
Highest SEQ_CNT
11
(LSB)
Table
number