Using a Data Domain as a datastore

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My company recently upgraded our enterprise backup solution so we have a data domain just sitting there spinning with no real purpose. I decided to mount this data domain to an ESXi host purposed for Development.

 

My question is: Has anyone out there done this before and how was the performace? I would have to imagine that the perfomance is terrible since the data domain must try and dedupe every block read/written. Not sure how that works..

 

Thanks!

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