When I enable data deduplicating on server 2012-R2 I can reduce data space on that volume. For exp. Before deduplication I have 5 GB data on disk. After deduplication It is reduce 2.5 gb data. And then I delete all of files and folders in that volume for test. So I expect to disk size is become 0 GB . But it still appears 2.5 GB using. But I wonder why that size didn't reduse. Could anyone to help me.
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