An account executive may tell you that the array you’ve been scoping has your make-or-break feature included. If so, then there should be no issue with letting you test one of their units to verify. Maybe it’s a feature they have, but you need to know more about the effectiveness of the feature, such as data deduplication. Deduplication ratios can vary between vendors based on the effectiveness and complexity of their data compaction algorithms. A PoC is a perfect opportunity to test a unit’s deduplication capabilities to see if it will yield your needed usable capacity. The PoC period is also the perfect time to see if this SAN’s more extraneous features actually provide any benefit to you and your organization or if they are just more cogs in the marketing fluff machine.