Refer to the exhibit.

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You are proposing a storage solution using VNX to support a Microsoft Exchange 2010 virtual implementation on VMware ESXi. You have worked with the customer to understand the Exchange requirements, which are described in the exhibit. Based on availability, performance, and Exchange mailbox size requirements, you are recommending RAID 5 with 7.2K rpm NL/SAS drives.

Following EMC best practices, what is the minimum number of spindles that would be required for this environment?