EMC Proven Professional – PowerMax Specialist — Question 42

What technology is used by Dell EMC Unity Snapshots?

Answer options

• A. Copy on First Write, which requires a storage resource reserved to hold original data that changed to preserve the point-in-time view.
• B. Redirect on White, which requires no storage resource to create a Snapshot, writes are redirected on parent pool.
• C. Copy on First Write, which requires no storage resource is needed to create a Snapshot, writes are copied pool.
• D. redirect on Write, which requires a storage reserved to hold original data that changed to preserve the point-in-time view.

Correct answer: D

Explanation

The correct answer is D, as it accurately describes the technology used by Dell EMC Unity Snapshots, which involves redirecting writes to preserve the original data. Options A and C incorrectly describe 'Copy on First Write', which is not applicable here, while B incorrectly mentions 'Redirect on White', which is a typographical error and misrepresents the concept.