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D.1.7
FCP
„
Frame Format
AMS200 supports the six Information Units (IU) shown in the following table.
Table D.10 Information Unit
No.
Name
Meaning
Support
1
FCP_CMND
Transfers SCSI Command or Task Management
{
2
FCP_XFER_READY
Notifies FCP_DATA will be transferred.
{
3
FCP_DATA
Transfers Data.
{
4
FCP_RSP
Transfers Status Information
{
5
FCP_CMND+FCP_DATA
Transfers SCSI Command and the first Data within a single
Information Unit. (Write Type Command)
×
6
FCP_DATA+FCP_RSP
Transfers last Data and the Status Information within a single
Information Unit. (Read Type Command)
×
The format of the standard frame header used in the FCP is shown in Table D.11.
Table D.11 Frame Header Format
Bits/Word
31 to 24
23 to 16
0
R_CTL
D_ID
1
Reserved
S_ID
2
TYPE
F_CTL
3
SEQ_ID
DF_CTL
4
OX_ID
5
RLTV_OFF
15 to 08
07 to 00
SEQ_CNT
RX_ID
R_CTL (Routing control):
This is used to identify the information category of the FCP frame.
1: FCP_DATA (Data In action, Data Out action).
5: FCP_XFER_RDY (Data delivery request).
6: FCP_CMND (Command/Task Management Request).
7: FCP_RSP (Command/Task Management Response).
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