单项选择题 A customer has installed an IBM System Storage DS8700 with 20 TB of storage， two-way processor version， 32 GB cache， and 16 Fibre Channel ports. The customer is beginning to experience throughput performance issues.  To address this performance consideration with minimal cost to the customer， which of the following should be the FIRST step to resolve the problem（）

单项选择题 The storage specialist needs to prepare an IBM System Storage DS8800 proposal including 64 host ports. The offer needs to meet the lowest possible price.  What is the minimum number of I/O Enclosure Pairs PCI-E for this configuration（）

单项选择题 A healthcare provider has two applications that they need to redundantly protect in a SAN environment. Their patient record application runs on Oracle 11i and consists of many small， randomly accessed files. The database is kept on three clustered Sun servers and currently uses 30 TB of data space. Their imaging application that retains and manages x-rays， consists of Filenet， CommonStore， and TSM running on an IBM Power750 server， and is currently using 65 TB of data space.  Which of the following disk solutions meets the customer’s requirement（）