Forum Discussion
mbr2gpt Disk Validation Failed
TammerAb
Please go throw the below steps:
- There should be a maximum of three primary partitions in the MBR partition table, including 100MB system partition as mentioned below:
1. (System, Active, Primary Partition)
2. C: (Boot, Page File, Cash Dumps, Primary Partition)
3. 😧 (Primary Partition) - You should not have any extended/logical partition, all three partitions must be primary partitions.
- If you have more than three partitions, you must delete the least important partitions after backing up the important data.
- I have done it successfully (Screenshot Attached)
mbr2gpt
The validation process has failed immediately once I added the fourth partition. (See the below screenshot)
I mean you can see in the screenshot I provided that I only have 2 partitions. Maybe you didn't see my screenshot? So your issue does not apply to me. I have no logical partitions, again the screenshot I posted shows this.
So I'm not sure if I'm missing something or you didn't look at my screenshot?
Here I reposted the screenshot in case maybe you couldn't see it.
As I can see from the screenshot you shared, I can't see an Active partition on disk1. There is one more condition from prerequisites as below:
- One primary partition must be active, try to activate your first partition (c:) from disk 1.
I am sharing two screenshots, before and after the active partition.
mbr2gpt tool validation result without active partitionmbr2gpt tool validation result with active partition
As per above screenshot, mbr2gpt tool required the OS partition as mentioned in Microsoft's official document as below:
https://docs.microsoft.com/en-us/windows/deployment/mbr-to-gpt#disk-prerequisites