The customer is planning a new IBM System Storage DS5020 using iSCSI and direct attachedfibre channel connectivity in a redundant configuration. The customer is planning to set up adisaster recovery solution in the near future by using Enhanced Remote Mirroring. Which of thefollowing considerations are critical for this customer？（）

• A、customer must reconfigure aniSCSI port for mirroring
• B、customer must set up a fabric and dedicate port 4 for disaster recovery
• C、customer must set up a fabric and dedicate port 2 for disaster recovery
• D、replication is not possible with the DS5020， they must consider the DS5300