单项选择题 A customer using an IBM System Storage DS8300 is facing performance problems. After the analysis by the technical specialist， the diagnosis indicates that the cache hits may be improved by a cache upgrade.  How can the system be monitored in order to check the benefits of the cache upgrade（）

单项选择题 A customer recently installed new SAN with an IBM System Storage DS8300 and several open systems servers to address a need for storage consolidation and still provide  good response time. They have asked the Business Partner technical representative for the most complete IBM product that would allow them to do performance reporting of the new SAN environment.  What is the best solution（）

单项选择题 A customer SAN environment has undergone significant growth over the past two years. They havealso suffered a high turnover rate with administrative personnel. The customer has asked a storage specialist for help in documenting and understanding their changing SAN environment. The ability to make configuration changes to devices would be a plus.    Which tool should the storage specialist suggest（）