Windows 10: Support Article to Resize Windows Recovery Partition is Incorrect for MBR Disks

Good morning everyone, today after encountering the KB5034441 update error I decided to use the following support article to increase the size of my windows recovery partition:KB5028997: Instructions to manually resize your partition to install the WinRE updateI'll note that I followed the MBR instructions as it seems my disk is still using it instead of GPT. At first glance the process went smoothly and I was able to reactivate the Windows Recovery Environment without issue, however on reboot I noticed something strange. The new partition I had just made showed up with a drive letter, and a r

:)

 

clone MBR HD to bootable GPT partition?

Hi,

1. You cannot convert mbr to gpt without data loss. otherwise, you can follow directions here:

FROM WINDOWS RECOVERY CONSOLE:

To change a master boot record disk into a GUID partition table disk using a command line

• 
  Back up or move the data on the basic master boot record (MBR) disk you want to convert into a GUID partition table (GPT) disk.
  
• 
  Open an elevated command prompt (right-click Command Prompt, and then click Run as Administrator) and type diskpart. If the disk does not contain any partitions or volumes, skip to step 6.
  
• 
  At the DISKPART prompt, type list disk. Make note of the disk number you want to convert.
  
• 
  At the DISKPART prompt, type select disk <disknumber>.
  
• 
  At the DISKPART prompt, type clean.
  

2. I'd suggest converting your vista drive to a virtual machine, load that up on your windows 10 system and use a program like virtualbox to run it.

 

Windows 10 1903 and Insider preview 20H1, show 100% free space in recovery partition. (MBR disk)

Hi,



Thank you for writing to Microsoft Community Forums.



Thank you for sharing the detailed information on the issue that you are facing.



We understand the difference in behavior between GPT and Legacy MBR even though both are hidden.



However, I can provide some information on the Disk Type, which changes the behavior how Disk Management reads the MBR partition.



As per my research, the default code type for Recovery Partition is 27. However, you may want to check code type of the partition using the
detail partition command before making any changes.



Follow the steps mentioned below to check the detailed partition type:

1. Type Command Prompt in the search bar on the
   Taskbar, right click on it and select Run as administrator.
   
2. Type Diskpart and hit Enter.
   
3. Type list disk.
   
4. Type select disk 0.
   
5. Type list partition.
   
6. Type select partition X (Replace X with partition number for recovery partition)
   
7. Type detail partition and take a note of the value for Type.
   
8. Type set id = 07 override.
   
9. You will receive a message Diskpart successfully set the partition ID.
   
10. Close Command Prompt window.
    

Open Disk Management and see the size of the Recovery partition.



For additional information, please refer the articles
Set id,
BIOS/MBR-based hard drive partitions and
UEFI/GPT-based hard drive partitions.

Let us know if you need any further assistance, we will be glad to help you.



Regards,

Nikhar Khare

Microsoft Community - Moderator

 

Windows 10 Recovery

When I used the W10 Pro recovery disk from other CPU, it went through the first steps and left me at the screen listing the various partitions on the drive. I choose what was the C drive and it returned the following:

'Windows cannot be installed on this disk. The selected disk has an MBR partition table. On EFI systems, Windows can only be installed to GPT disks.'

I will try what you suggested and get back.

Matt