1 basic link services, Basic link services – Seagate Fibre Channel Interface User Manual
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Fibre Channel Interface Manual, Rev. D
9.1
Basic link services
The drive supports the Abort Sequence (ABTS) and two basic services replies, Basic Accept (BA_ACC) and
Basic Reject (BA_RJT). All other basic link services are discarded by the drive. Basic link service functions are
identified by the R_CTL field of the header.
Field definitions (listed alphabetically)
D_ID (Destination Identifier)
The address of the drive for ABTS. This value must match the current address of the drive. For the basic link service
replies, the D_ID is the address of the initiator.
Table 18:
Basic link services header
Bit
Byte
7
6
5
4
3
2
1
0
0
R_CTL
1
(MSB)
D_ID
2
3
(LSB)
4
0
0
0
0
0
0
0
0
Reserved
5
(MSB)
S_ID
6
7
(LSB)
8
0
0
0
0
0
0
0
0
Type
9
(MSB)
F_CTL
10
11
(LSB)
12
SEQ_ID
13
0
0
0
0
0
0
0
0
DF_CTL
14
(MSB)
SEQ_CNT
15
(LSB)
16
(MSB)
OX_ID
17
(LSB)
18
1
1
1
1
1
1
1
1
19
1
1
1
1
1
1
1
1
RX_ID
20
(MSB)
Parameter
21
22
23
(LSB)
Table
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