单项选择题 IBM SONAS provides extreme scale out capability, a globally clustered NAS file system built upon（）.

单项选择题 A customer is running Microsoft Windows 2003, Sun Solaris, and IBM AIX with a total capacity of20 TB. This customer needs high availability for e-business applications. The servers are currently connected to two EMC Symmetrix subsystems that are running RAID 1. The customer wants to consolidate all storage into an IBM System Storage DS8700. How many Fibre Channel drive sets are needed to satisfy the total capacity for this customer?（）

单项选择题 Which of the following provides Fibre Channel over IP and FCIP Tunneling Service for distance extension, which can enable cost-effective and manageable metro and global business continuity solutions?（）