Is System Reserved Partition not showing in Disk Management ? Are you looking for effective methods for fixing this issue? Here, this post from MiniTool provides several solutions that may help you work this issue out. You can have a try.

What is System Reserved Partition

The System Reserve Partition is a small partition on your hard drive that is used to store boot information for Windows. This partition was first introduced with Windows 7, so you can only find it on Windows 7 and the later versions. It consumes 100 MB of space on Windows 7, 350 MB of space on Windows 8, and 500 MB of space on Windows 10.

This kind of partition is created to reserve a portion of disk space for possible subsequent use during the clean installation process of the Windows operating system. It is often located before the system partition (normally C: drive). Additionally, the System Reserved Partition doesn’t have a drive letter. So, you can see it just in Disk Management or a third-party partition manager.

The System Reserved Partition is essential for a PC to boot up. You can view the main functions of this partition below.

  • Holds the Boot Manager Code, Boot Configuration Database (BCD), and Windows Recovery Environment.
  • Reserves space for startup files such as the BitLocker Drive Encryption so that you are likely to encrypt your system drive using BitLocker without repartitioning the drive.

Why is System Reserved Partition Not Showing in Disk Management

Since Windows usually doesn’t assign a drive letter to System Reserved Partition, you can only see this partition by opening Disk Management or other similar third-party tools. However, sometimes you may find System Reserved Partition not showing in Disk Management. It’s a troubling issue and may occur due to multiple reasons. Here we summarize several cases where you may encounter the issue on your Windows 10:

  • The size of this partition is less than 600MB.
  • The Boot Manager is missing.
  • During the process of cloning the drive, this partition may be renamed/modified or not cloned by the cloning software.
  • You delete this partition accidentally.

Once the “Windows 10 System Reserved Partition missing” issue happens, you are unable to update your PC or boot up the system, receiving the error message that says Operating System not found or boot failure . To make sure your Windows can run normally, you have to take measures to fix this issue. If you have no idea how to get rid of this issue, you can try the following methods.

In case data loss occurs due to any improper operation during the process, you’d better back up your Windows in advance.

Method 1: Increase Space in System Reserved Partition

Extending System Reserved Partition to get more space may help you solve the “Windows 10 System Reserved Partition missing” issue. Since there is no unallocated space adjacent to System Reserved Partition, you may see Extend Volume grayed out while attempting to extend this partition in Disk Management.

To ensure this operation can be done successfully, you ought to use a piece of third-party partition managing software. Here, we highly recommend MiniTool Partition Wizard to you. It’s a professional partition manager that contains a bunch of functions, such as creating/formatting/extending/resizing partitions, recovering data/partitions, migrating OS to SSD/HDD, and so on.

In this section, you will learn how to extend System Reserved Partition with MiniTool Partition Wizard in detail.

Part 1: Create a Bootable USB Flash Drive

To begin with, it’s recommended that you create a bootable media with the Bootable Media Builder function of this tool so that you can boot your system into the MiniTool PE Loader screen.

The Bootable Media Builder is supported in Pro and higher editions. So, upgrade MiniTool Partition Wizard to a proper edition before the operation. Besides, this operation will format your USB drive. So, you’d better make a backup first.