EMC Proven Professional – RecoverPoint Specialist — Question 3

A customer plans to deploy N+2:1 protection on a 5-node Isilon cluster. How much capacity will be used to store a 1024 KiB file?

Answer options

• A. 1024 KiB
• B. 1280 KiB
• C. 1792 KiB
• D. 1920 KiB

Correct answer: C

Explanation

The N+2:1 protection level means that for every file, two additional copies are stored for redundancy, plus one for the original, resulting in a total of 3 copies. Therefore, for a 1024 KiB file, the total storage used is 1024 KiB * 3 = 3072 KiB, but the effective capacity is calculated as 1024 KiB + (2 * 1024 KiB * 0.25) = 1792 KiB after accounting for the protection scheme, making C the correct answer. Options A and B do not account for the redundancy, while D is excessive for the given file size.