windows powershell

Configure Data Deduplication on Windows Server 2012 R2

In this tutorial we will show you a fast and easy way to configure Data Deduplication via Powershell.

At first we need to add role for deduplication:

Import-Module ServerManager
Add-WindowsFeature -name FS-Data-Deduplication
Import-Module Deduplication

Now we need to enable deduplication (this time on E: drive).

Enable-DedupVolume E: -UsageType Default

If you are planning to make deduplication for Hyper-V machines storages, run this command:

Enable-DedupVolume E: -UsageType HyperV

Now we need to set the minimum age for files (days before the deduplication starts).

Set-Dedupvolume E: -MinimumFileAgeDays 20

If you want, you can add a folder for deduplication

Set-DedupVolume –Volume "E:" -ExcludeFolder "E:\temp"

Now set the minimum size for file:

Set-DedupVolume –Volume "E:" -MinimumFileSize "32768"

At this step we need to disable deduplication for files in use:

Set-DedupVolume –Volume "E:" -OptimizeInUseFiles:$False
Set-DedupVolume –Volume "E:" -OptimizePartialFiles:$False

To get the list of deduplication processes run the following command:


To get deduplication schedule run:


If you want to add a new task, run this command — New-DedupSchedule

Here is an example on how to add new optimization task:

New-DedupSchedule –Name "ThroughputOptimization" –Type Optimization –Days on,Tues,Wed,Thurs,Fri,Sunday –Start 00:00 –DurationHours 8 -Priority Normal

Now let`s take a closer look on this example:

Name — new task name
Type — task type (Optimization/GarbageCollection/Scrubbing)
Scrubbing — recovers damaged data
GarbageCollection — free up some space
Optimization — deduplication and data compression
Days in what days should the task run?
Start at what time?
DurationHours how many hours the task will be on run

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To view current deduplication status run command:


You must get something like this:

Enabled   UsageType    SavedSpace    SavingsRate   Volume
——-           ———             ———-             ————           ——
True          Default          76.94 GB             66 %             E:

In this example, deduplication reduced space from 65GB to 354MB.

And that`s great efficiency! Easy set ups, guys!

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