Seagate Fibre Channel Interface - Manual (Page 149)

Fibre Channel Interface Manual, Rev. D 135
Field definitions (listed alphabetically)
DF_CTL (Data Field Control)
00h
No optional Fibre Channel headers are used.
D_ID (Destination Identifier)
The address of the initiator that originated the command for which the data is being requested.
F_CTL (Frame Control)
Set to 890000h for FCP CMND frames. This indicates the frame is sent by the responder of the exchange, not the origina-
tor, and the frame is the last of the Fibre Channel sequence. Sequence initiative is transferred so the initiator may send the
requested data.
OX_ID (Originator Exchange Identifier)
The drive returns the OX_ID it received from the initiator with the FCP CMND.
Parameter
Not used for the FCP XFER RDY.
R_CTL (Routing Control)
Set to Data Descriptor.
RX_ID (Responder Identifier)
Not used by the drive. The value of FFFFh indicates the RX_ID is not being used.
SEQ_CNT (Sequence Count)
0000h
Indicates that this is the first frame of the Fibre Channel sequence. The FCP XFER RDY is a single frame
sequence.
SEQ_ID (Sequence Identifier)
The drive sends FFh.
S_ID (Source Identifier)
Address of the drive.
Type
08h
For all SCSI FCP frames.
Table
number
80
80
80
80
80
80
80
80
80
80
80