Forum Discussion
mbr2gpt Disk Validation Failed
I've read the documentation. I do not see anything I am doing that does not match the documentation.
Apologies if I am missing something obvious but it would be helpful to me if you can point to something I am doing wrong. No need to post the documents I've read before.
Did you try to shrink your C: drive? I will suggest you to shrink the drive and make 1 more primary partition of 4GB at the end of the disk. Let's give it another try.
Hi Blackskull,
Thanks for contacting me, as I can see from the screenshot:
- Your drive c: from disk0 has 70% free space which is more than enough
- You also have a system drive (c:) in your disk0
- You have active partition (c:)
- You don't have more than 3 partitions on disk0, which is also good.
Therefore, I'd suggest to shrink your drive c: and create another partition of 2GB. After this step try to validate the configuration by mbr2gpt tool. I hope this step will be a useful for you.
I am having the exact same problem with the exception that my primary boot disk with the OS is disk 0. It has two partitions one being the active boot partition and the second being the recovery partition. I have tried several times but it always fails.
Hi TammerAb,
Please share latest screenshot from disk management console, that will be helpful to identify the point of failure.
hello SalmanAhmed i tried what you suggested and the program still failed.
Hi Blackskull
Please confirm that all of your 3 partitions are primary partition, the requirement says that the disk should not have any extended/logical partition.
Hello SalmanAhmed 2 of the partitions are primary the third is the recovery partition and I can't change it.
Hi Blackskull,
Please make sure that you have 1 active partition as well, also share the screenshot of disk management console.
Hi everyone, this is my first time here: I don't know if this could solve your problem, but it worked for me. In my case, the operating system (Win 10 pro 21H2) installed on disk2 (500GB SSD Gigabyte GP-ASM2 NVMe). I tried to upgrade to GPT but without success: same error message (all too common). However, I was using the freeware <MiniTool Partition Wizard> to try to switch from MBR to GPT (and I found that it is ONLY possible for the paid version ...) when I found the command "Align All Partition". After some internet research, I found this page <https://superuser.com/questions/225936/what-does-it-mean-to-align-partitions>. Well, even after reading that the command is only for improving the performance of the operating system (... the system really should know the true block size ...) I've try to proceed with this 'feature'. Well, this (IN MY CASE) solved the mbr2gpt /validate error message, so now my OS disk is GPT. This is where I write right now ... good luck.
