Windows 10: MBR2GPT Error: ValidateLayout: First partition too close to the beginning of the disk.

Trying to enable REBAR for my GPU, and converting to GPT is a prerequisite because the setting requires me to disable CSM support in BIOS. The full error when I validate is: ValidateLayout: First partition too close to the beginning of the disk. Should start at offset 17408 or above, found at 4096

I've gathered this is my SSD alignment, which to my knowledge is correct because everything in MSINFO is divisible by 4096. The first partition, which is the Windows System Reserved partition of ~120MB, starts at 4096. In order to be properly aligned (still divisible by 4096) and meet the criteria put forth in the error message, I ASSUME I need to move the partition alignment/starting offset to 20,480‬ (the lowest number divisible by 4096 that is above 17408)?

.... am I on the right track? If so, how do I do this without formatting the drive and losing everything?

submitted by /u/Celriot1
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:)

 

W7 Hard drive partition issue

to get rid of that 100 meg windows partition that setup creates for you on a new install on a blank hdd:

- press shift+f10 when on the partition management screen in setup <-- this opens a command prompt
- diskpart <-- start the windows command line partition management tool
- list disk <--- list the installed hdds in this computer for the next step
- select disk 0 <- might have to replace 0 with the number of the correct disk
- clean <-- this will erase all data on the disk you selected one step up- dont use the wrong disk!
- create partition primary <- creates a primary partition taking up all space on the drive, adjust the command if necessary
- exit, exit to exit diskpart and the command prompt
- click refresh in partition manager and select your newly created partition and install to that

 

mbr2gpt

MBR2GPT: Attempting to convert disk 0
MBR2GPT: Retrieving layout of disk
MBR2GPT: Validating layout, disk sector size is: 512 bytes
Disk layout validation failed for disk 0

 

mbr2gpt error 0x00000000 partition 23 mapping missing

Please post a screenshot of Disk Management, which I read like a doctor reads X-rays. Follow the steps here so I can see everything needed to advise you:

http://answers.microsoft.com/en-us/windows/foru...

I do not support MBR2GPT as it is faulty and will not run correctly from what I have seen. But I will advise you on any obvious partition issues I spot.