By Cherry / Last Updated May 4, 2023


How to clone Windows Server 2012?

I have a Windows Server 2012 Machine with 1 physical hard drive. I worked with it well. But recently, I found there is nearly no free space on the hard drive. I’m planning to switch my hard drive to a larger one, how can I switch the hard drive while keeping the old Server 2012 and other data?”

- Question from

How to solve the question in the Scenario?

To solve the problem in the Scenario, you have 2 options:

▶ 1. You can migrate OS to HDD/SSD only and leave the hard drive as the data storage drive. This way, you do not need to spend large money to purchase a big drive.

▶ 2. If you have an adequate budget, you can upgrade the hard drive to a larger HDD/SSD, and migrate all data from the old hard drive to the new HDD/SSD.

There are many other problems that you can solve by cloning Windows Server 2012. For example, cloning Windows Server 2012 to another hard drive can prevent data loss. Thus, when the system fails, you’ll just swap it with the latest clone. Well, how to safely clone Windows Server 2012 (R2) disk to another HDD/SSD?

The cloning software for Windows Server 2012 (R2)

Speaking of cloning Windows Server 2012, you may need Server cloning software. The AOMEI Partition Assistant Server should be the greatest one. It allows you to copy Windows Server 2012 (R2) disk to another HDD/SSD with a few simple steps. And it supports Server 2008(R2), 2012(R2), 2016, 2019, 2022, if your other Server devices need professional management, you can also trust this tool.

With this software, you can clone your Windows Server 2012 (R2) flexibly.  No matter the entire Windows Server 2012 hard drive, or a specific partition, it will operate well. Even if you only want to migrate OS to SSD/HDD, you can use its "Migrate OS to SSD" function.

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1. A hard drive that is larger than the original hard drive on your Windows Server 2012 (R2) machine. If you only want to clone a part of the data to the new hard drive, the drive should be large enough to store the data. Connect the hard drive to the machine and make sure it can be detected.
2. Install AOMEI Partition Assistant Server on your Windows Server machine.

After all the preparations, we can start to follow the steps below to clone the Windows Server disk to another HDD or SSD.

Step 1. Launch AOMEI Partition Assistant Server. It will show you the basic environment of your hard drives on your machine. Here, right-click on the Server disk and choose "Clone Disk".

Select Copy Disk

Step 2. Here you can select the way to clone Windows Server 2012 (R2) disk, "Clone Disk Quickly" or "Sector-by-Sector Clone".

Disk Copying Methods

Clone Disk Quickly: This way is highly recommended because it only clones the used space on the source disk, which means it allows you to clone disk to a smaller drive, and it allows you to edit partition size as you like.
Sector-by-Sector Clone: This way would clone every byte on the source disk no matter it is used or not. Thus, you do not be allowed to adjust the partitions’ size during cloning. Plus, it will take more time and need a larger target disk.

Step 3. Then, you need to choose the hard drive you prepared before as the destination drive. If you are cloning to an SSD, here you should check the option “Optimize the performance of SSD”, which helps you clone hard drive to SSD alignment.

Select Destination Disk

Step 4. Here you can edit partitions. Or you can resize Windows Server 2012 partition with AOMEI Partition Assistant Server after clone.

Edit Partition Size

Step 5. It will show you a note about how to boot from the cloned drive after cloning. Read it and remember it. Click "Finish".

Boot Note

Step 6. You will back to the main interface, click "Apply" to submit the whole progress.


This progress will execute under PreOS mode. When it finishes, you can change the boot order to boot from the new drive. Or you can switch the old drive out with the new drive, and boot from it directly.


Clone Windows Server 2012 (R2) disk with AOMEI Partition Assistant Server seems a very easy thing. It does a really good job on this task. Besides Disk Clone, it also provides you Partition Clone function, so you can only clone a specific partition instead of the whole partition.

If you only want to move OS to a new hard drive, its "Migrate OS to SSD" function will achieve that goal. It should be the greatest cloning software for Windows Server that meets your multiple requirements.