Forum Discussion
TammerAb
Oct 06, 2021Copper Contributor
mbr2gpt Disk Validation Failed
I've been trying to get the mbr2gpt Program to work and no matter what I do it will not work This is the command I try to run mbr2gpt /allowFullOS /disk:1 /validate DISKPART> list disk Di...
- Nov 21, 2021
SalmanAhmed
Oct 07, 2021Steel Contributor
I had the same issue even I tried from Windows PE command prompt, I resolved the issue by using the third-party disk partition tool.
TammerAb
Oct 07, 2021Copper Contributor
Yes that is an option. But I'd like to avoid paying for a piece of Software I will only use one time.
- SalmanAhmedOct 07, 2021Steel Contributor
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)
- Zac_JoyceMar 17, 2024Copper Contributor
SalmanAhmed how do i know which disk is least important which disk is least important
- TammerAbOct 07, 2021Copper Contributor
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.
- SalmanAhmedOct 08, 2021Steel Contributor
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
- There should be a maximum of three primary partitions in the MBR partition table, including 100MB system partition as mentioned below: