单项选择题 A customer is using Metro Mirror to mirror the company inventory database from an IBM System Storage DS8700 at their headquarters to a DS8300 at a remote site. Due to bandwidth concerns they are planning to change the mirroring mode to Global Mirroring. They have asked for assistance. What must be done to help the customer make the change?（）

单项选择题 A customer plans to install ten Microsoft Windows servers, three Linux servers, and five AIX servers, with two Fibre Channel host bus adapters each as part of an IBM DS8700 implementation. What multipathing driver is required to build a redundant solution?（）

单项选择题 A customer has two separate storage networks and is planning to implement an SVC to provide for FlashCopy between the two networks. What is the minimum number of ISL ports required?（）