Learn How to Repartition a Hard Drive without Formatting Partition and Re-installing Windows OS

About Hard Drive Storage

Hard drive is storage device where to save the data and files, and we can utilize the disk within the computer by creating drive. Most of the users will partition own hard drive to two partitions or more to ensure a variety of data can be classified storage, so as to avoid a risk of data loss. While operating system partition crashed, we can again install a new system to repair it but this does not affect the data on the other partitions. If all the data are placed in the operating system partition, and you may need to recover your data or documents when system was attacked by virus and cannot enter into the windows.

Question about How to Repartition a Hard Drive

Someone asked "I installed Vista in the C: drive, and there is only one partition on the disk, I decided to install another new system Windows 7 to the disk, how to do? I cannot create partition on the disk due to no unallocated space." Actually, we can repartition a hard drive into desired sizes on the basis of data security, but this may need to use 3rd party tool - AOMEI Partition Assistant, the professional Windows partition manager to repartition a hard drive.

Free Partition Manager to Repartition A Hard Disk

AOMEI Partition Assistant Pro Edition is powerful solution to allow you experience with all features such as resize, extend system partition,create, delete and format partition, copy disk or copy partition and so on. It can work wonderfully on hardware RAID and Windows 7/2000/XP/Vista operating systems (Both 32bit and 64bit). Your all data on the disk can be completely protected when all operations is being processed. This utility can repartition a hard drive easily to help junior users to manage their disk.

How to Repartition a Hard Drive without Losing Data with Partition Assistant

Here are the steps you have to follow to repartition a hard drive (shrink big partition and create a new partition without losing data) through resizing operation in windows:

To begin, You need to download the software:

Free download partition magic (File Size: 3.12MB)

1. Install AOMEI Partition Assistant, run it as administrator privileges and get Windows partition manager main interface:


2. Right click on the C: drive you want to repartition and select "resize" from the shortcut menu.


3. Shrink partition: drag C: parition right side leftwards to release some unallocated space as we wish and then click "OK":


4. Now the C: drive has been shrunk, and we can make a new partition in unallocated space to keep classified data. Right click unallocated space and choose "Create" option to get new window as following, it will guide you specify the new partition info, after that, click "OK":


5. After completing all operations, please do not forget to click "Apply" button (on the toolbar) to change the operations to physical disk. After restarting the computer, you will see the changes:


P.S. To achieve shrinking system drive, the software will require you to restart your computer to do these operations in a PreOS mode.

Free Download Partition Magic software

In addition, you can get AOMEI Partition Assistant Server Edition--server partition magic if you want to manage hard drive and repartition a hard drive for your Windows Server 2000/2003/2008. However, if you are a personal user or business PC owner work on Windows 7/2000/XP/Vista, the AOMEI Partition Assistant Pro Edition is a good choice to service for you. Please click the link to download partition manager.


Download AOMEI Partition Assistant Professional Edition (File Size: 3.12MB)

Buy AOMEI Partition Assistant Professional Edition (US$ 36.00 only)

Which disk storage type is your hard drive? The article above only applies to basic disk storage. If you also have dynamic disk storage, we recommend AOMEI Dynamic Disk Manager which allows you to manage dynamic disk and dynamic volume easily and safely.
  • Resize dynamic disk
  • Extend dynamic system volume
  • Expand/Shrink/Move dynamic partition
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