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Product and version information:
The storage device and the application server were on an DAS network as shown in Figure1.
Figure 1 DAS network
When the application server and the storage device were on a DAS network and the port mode was set to Point to Point, the following symptoms may occur: The FC host port Running indicator was off and the FC host port Running Status was Offline on the ISM.
On the ISM menu bar, choose Event > Event Management. In the Event Management dialog box the fault information indicates an FC host port link-down.
Figure2 shows the chip supplier PMC's analysis.
Figure 2 Chip supplier PMC's analysis
From the analysis we can see that the Emulex12002 HBA does not strictly comply with the FC protocol. It is not possible for the chip to be redesigned so this problem cannot be avoided on storage devices. Therefore, when the mode of an FC host port is set to Point to Point, due to the incompliance of the Emulex12002 HBA with the FC protocol, the application server may fail to set up a connection to the storage device.