Dell-EMC
E20-326 · Question #43
E20-326 Question #43: Real Exam Question with Answer & Explanation
The correct answer is A. Uses asynchronous copy on first write (ACOFW), which has no COFW penalty.. See the full explanation below for the reasoning.
Question
An existing TimeFinder customer migrated from a DMX-3 running Enginuity 5771 to a new VMAX array. A colleague advised them TimeFinder/Clone performance would improve on the VMAX due to changes to the Copy on First Write (COFW) mechanism. The customer asks you to explain how the COFW mechanism changed on the VMAX. What do you advise the customer?
Options
- AUses asynchronous copy on first write (ACOFW), which has no COFW penalty.
- BUses synchronous copy on first write (COFW), which has no COFW penalty.
- CUses asynchronous copy on first write (ACOFW), which holds protected writes in cache.
- DUses synchronous copy on first write (COFW), which completes protected writes in cache.
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