參數(shù)資料
型號(hào): LSIFC929X
英文描述: LSIFC929X dual channel fibre solutions
中文描述: LSIFC929X雙通道光纖解決方案
文件頁數(shù): 27/144頁
文件大?。?/td> 1496K
代理商: LSIFC929X
FC Ports
2-7
Figure 2.6
shows how the Exchange flows between the initiator and
target. The initiator starts the FCP Exchange by sending a Command
Sequence containing one frame to the target. The frame’s payload
contains the Command Descriptor Block (CDB). The target responds
with a Data Delivery Request Sequence containing one frame. The
payload of this frame contains a XFER_RDY response. Once the initiator
receives the target’s response, it begins sending the Data Sequence(s),
which may contain one or more frames. This is analogous to parallel
SCSI’s DATA_OUT phase. When the target has received the last frame
of the Data Sequence(s), it sends a Response Sequence containing one
frame to the initiator, thus concluding the FCP Exchange.
Figure 2.6
Write Event Trellis
2.5 FC Ports
FC devices are called nodes. Each node has at least one port to provide
access to other ports in other nodes. The “port” is the hardware entity
within a node that performs data communications over the FC link.
The FC standard defines a variety of types of ports, based on the
location of the port and the topology associated with it. The most
commonly used ports are N_Ports, NL_Ports, F_Ports, and FL_Ports.
These types of ports appear in
Figure 2.7
,
Figure 2.8
and
Figure 2.9
.
Initiator
Fabric
CMD SEQ
Data SEQ Frame 1
Data SEQ Frame 2
Data SEQ Frame N
Data Req SEQ
RSP SEQ
Target
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