Which configuration best fits the project requirements?

You are designing a new Isilon system to store mobile device video clips. The files average 800MB in size and the application team tells you to plan for up to 15,000 new files per day. The product manager for this new service wants enough capacity for the first year and reminds you that response time for storing and retrieving the files is important for customer satisfaction.

The files will be accessed frequently for the first 48 hours after creation, and then very infrequently after seven days. You plan to use N+2:1 protection, and will configure a SmartPools policy to move inactive files to an archive tier within the cluster.

Which configuration best fits the project requirements?
A . 4 x X200 nodes with SSD; 36 x NL400 nodes with 4TB drives
B . 38 x X400 nodes with 4TB drives and SSD
C . 4 x S200 nodes with SSD; 45 x NL400 nodes with 3TB drives
D . 4 x X400 nodes with 1TB drives; 36 x NL400 nodes with 4TB drives

Answer: A