单项选择题
A.IBM System Storage DS8700 2 way
B.IBM System Storage DCS9900
C.IBM System Storage DS8700 4 way
D.IBM XIV Storage System
单项选择题 A customer has an IBM System Storage DS8700 at their primary site and an XIV system at their recovery site， which is 9.5 kilometers away. They want to replicate data for disaster recovery backup. Which factor is a primary consideration when proposing a solution for this customer（）
单项选择题 TooptimizeperformanceonanIBMSystemStorageDS8000，theinput/outputactivityshouldbespreadacross（）
单项选择题 A customer has two data centers， 500 kilometers apart. The customer requests a proposal for new storage subsystems and a disaster recovery solution that provides consistent data in the event of a disaster at the local site. Which IBM System Storage DS8000 solution should the storage specialist propose to the client（）