By Delia / Last update January 7, 2022

What is the hidden recovery partition for?

If you take a close look at your hard drive, you may find out that there is less disk space than it should have. When you open Disk Management to look into it, you’ll see a recovery partition or OEM partition taking a lot of space of your disk. What is this recovery partition and OEM partition? Many computer manufacturers will create a recovery partition, which consumes a few to a dozen more gigabytes disk space. this recovery partitions enables you to restore computer to the factory default setting by pressing a specific key. While installing Windows 10/8/7, Windows will also create a recovery partition, which allows you to use recovery options when your computer has problems. The Windows recovery partition is much smaller than the factory recovery partition, so you won’t mix them. In general, the Windows 10 recovery partition takes 450MB, Windows 8 350MB, and Windows 7 200MB.

Under some circumstances, you may need to delete the recovery partition temporarily, for example, you want to add unallocated space to system drive but the hidden recovery partition is in the way. In this case, you need to backup the recovery partition if you still want the ability to restore to factory settings. Moreover, the hard drive might fail, to backup the recovery partition is necessary fir those people who want to be able to recover to factory default settings.

How to create recovery partition backup?

The Windows built in backup tool Backup and Restore can only include partitions with a drive letter in the backup. Since the recovery partition is hidden without a drive letter by default, you cannot use Backup and Restore to backup the factory recovery partition, but you can use Wbadmin to perform the backup from command line by using volume GUID to specify the hidden recovery partition.

To backup with Wbadmin:

1. Open an elevated command prompt with administrator permission.

2. Write a command for the backup referring to the following syntax:

Wbadmin start backup –backuptarget:[backup location] –include:[drive letter or volume GUID]\\?\Volume{95b895b8-0000-0000-0000-40f30d000000}\

If you do not know the volume GUID, you run the “mountvol”command.

For example, Wbadmin start backup –backuptarget:G: –include:\\?\Volume{95b895b8-0000-0000-0000-40f30d000000}\

Backup Hidden Recovery Partition

After you run the command, Wbadmin will start the backup right away. It seems quite convenient, but if either the recovery partition or the backup target location partition is not formmatted with NTFS, you will receive the error that, resulting the backup failed. In this case, you need to use third party free backup software.

How to backup recovery partition with AOMEI Backupper?

AOMEI Backupper Standard is free Windows backup utility that allows you to backup any files, partitions on your hard drive, and you can also backup only OS and the entire hard drive as well. It provides an intuitive interface, so you can perform a backup with a few clicks. Besides, AOMEI Backupper also provides the partition clone feature, so you copy recovery partition to USB, external hard drive or network drive without imaging. Let’s see how it looks like:

1. Download, install and open this backup software for Windows.

2. Under Backup tab, select Partition Backup.

Partition Backup

3. Then click "Add Partition or Volume" to select the recovery partition.

Select Recovery Partition

4. Click to specify a location path to save the backup image. It allows you to choose any location that can be detected in Windows Explorer.

Start Backup

5. If you need more options, such as encryption, email notification, you can click the “Options” button. In the same screen, view the task and then lick Start Backup to start the backup job.

Backup Options

In a short time, AOMEI Backupper will backup hidden recovery partition for you. It allows you to create a bootable rescue media (using a USB drive or CD/DVD), so you can restore the recovery partition even when there is no system on the hard drive. Actually, you can use it to regularly and automatically backup Windows 7/8/10 operating system so that you can restore Windows to any point of time as you wish, beside the AOMEI Backupper Professional Edition will help you to merge multiple images in one to make restore job easier.