单项选择题 A customer has requested an IBM System Storage DS8700 solution to meet the following requirements： - 20% yearly growth - 29，000 IOPS  - approximately 50/50 mix of read/write operations - small （4 KB） data transfers  The storage specialist has created a Disk Magic model in which each port is capable of approximately 2，900 to 3，100 IOPS.  What is the minimum number of ports that should be configured on the DS8700 to handle the projected workload for the first year（）

单项选择题 The storage specialist sized a DS8800 proposal with eight host adapters in the four-port version. 240 drives of the 146GB-15k rpm type will be installed. The proposal needs to meet a very competitive price. The customer will have only minor capacity growth in the future.  Which of the following solutions best meets these requirements（）

单项选择题 A financial customer has three data centers that are four kilometers apart. Their SAP application data needs to be kept synchronized within 10 milliseconds.  Which solution satisfies the customer’s recovery time objective（）