Dell EMC Specialist – Systems Administrator, ECS — Question 28

A planned VxRail Stretched Cluster will have four hybrid nodes at each site. What is the recommended storage policy to ensure cross-site and local protection, using storage as efficiently as possible?

Answer options

• A. Site disaster tolerance – None keep data on Preferred (stretched cluster) Failures to tolerate – 1 failure – RAID-1 (Mirroring)
• B. Site disaster tolerance – Dual site mirroring (stretched cluster) Failures to tolerate – 1 failure – RAID-5 (Erasure Coding)
• C. Site disaster tolerance – Dual site mirroring (stretched cluster) Failures to tolerate – No data redundancy
• D. Site disaster tolerance – Dual site mirroring (stretched cluster) Failures to tolerate – 1 failure – RAID-1 (Mirroring)

Correct answer: B

Explanation

The correct answer is B because it utilizes dual site mirroring, which provides data protection across both sites while also employing RAID-5 for efficient storage use and tolerating one failure. Options A and D do not maximize storage efficiency as they rely on RAID-1, which requires more storage for mirroring. Option C lacks data redundancy, making it unsuitable for protecting against failures.