单项选择题 A SAN needs to undergo disruptive maintenance, which will effect a hosted production system with multiple applications and related volume groups, one of which, datavg, resides on the SAN. There is one spare disk in the system but it is smaller than datavg. How can application outages and risk of corruption be minimized?（）

单项选择题 What is the objective of the superstrict option that can be used when creating mirrors?（）

单项选择题 An administrator wants to test the performance of an application at different memory sizes. What is the most effective way to perform the test and collect statistical information for each test?（）