Disk management shows one less partition than diskpart and Macrium

It is the Microsoft Reserved Partition - Microsoft Reserved Partition - Wikipedia

It has been there for a long time.

PolarNettles said:

It is the Microsoft Reserved Partition - Microsoft Reserved Partition - Wikipedia

It has been there for a long time.

Thanks for your response. My query is why disk management does not show all partitions.

The disk management is a Windows tool.
It is not designed to display all partitions.
The information that it displays can be incorrect.

For example:

Code:

Although Disk Management might show the EFI system partition and the  recovery partition as 100% free, it's lying. These partitions are  generally pretty full with really important files your PC needs to  operate properly. It's best to just leave them alone to do their jobs  starting your PC and helping you recover from problems.

Overview of Disk Management | Microsoft Docs

zbook said:

The disk management is a Windows tool.
It is not designed to display all partitions.
The information that it displays can be incorrect.

For example:

Code:

Although Disk Management might show the EFI system partition and the  recovery partition as 100% free, it's lying. These partitions are  generally pretty full with really important files your PC needs to  operate properly. It's best to just leave them alone to do their jobs  starting your PC and helping you recover from problems.

Overview of Disk Management | Microsoft Docs

@zbook Thank you.