Fujitsu MAT3300FC 用户手册
Fibre Channel Interface
1-8
C141-C008
1.2.2 Frame structure (refer to FC-PH, chapter 17)
A frame format is shown in Figure 1.6.
0-2048+64 (optional header)
0-528
6
24
1
word count
4
min6
min24
byte count
fill words
EOF
CRC
Payload
Frame
Header
Header
SOF
fill words
1
4
1
4
Figure 1.6 Frame format
a) SOF; Start of frame indicates the beginning of the frame.
b) Frame Header; Used as link control, drive protocol transfer and detect error
condition.
The frame header format is listed in Table 1.1.
The frame header format is listed in Table 1.1.
Table 1.1 Frame header format
word/byte
0 (bits 31 – 24)
1 (bits 23 – 16)
2 (bits 15 – 08)
3 (bits 07 – 00)
0 R_CTL
D_ID
1 reserved
S_ID
2 TYPE
F_CTL
3 SEQ_ID
DF_CTL
SEQ_CNT
4 OX_ID
RX_ID
5 OFFSET
*1 R_CTL; Routing Control to categorize the frame.
D_ID; Destination Identifier, N_port address to which the frame is being
sent.
S_ID; Source Identifier, N_port address originating the frame.
*2 TYPE; Data Structure Type, identifies the frame protocol.
*3 F_CTL; Frame Control information
SEQ_ID;
Sequence Identifier, uniquely identifies frames in a non-
streamed sequence.
streamed sequence.
DF_CTL;
Data Field Control, specifies the optional headers in the
payload. This field is not supported by the drive and used as
00h.
payload. This field is not supported by the drive and used as
00h.
SEQ_CNT; Sequence Count, identifies the order of the frames.