Something is failing the check for disk 0.
Please go ahead and post a screenshot of Disk Management showing your full layout to see if it will reveal what's wrong with disk 0.
Disk Management - How to Post a Screenshot of | Windows 10 Tutorials
Yeah - mbr2gpt is a bit stupid if you have four primary partitions with one being the mbr sytem partition. It tries to create an efi partition, and falls over as you can only have four primary partitions in legacy mbr bios.
It makes more sense to do as you did in effect i.e. delete system partition first.
Hoping you may be able to assist me as well.
This is driving me bonkers trying ot figure this thing out. I keep getting the following failure:
C:\WINDOWS\system32>mbr2gpt /validate /disk:0 /allowFullOS
MBR2GPT: Attempting to validate disk 0
MBR2GPT: Retrieving layout of disk
MBR2GPT: Validating layout, disk sector size is: 512 bytes
Disk layout validation failed for disk 0
But when I check partitions, I only have the following:
DISKPART> list partition
Partition ### Type Size Offset
------------- ---------------- ------- -------
Partition 1 Primary 446 GB 1024 KB
Partition 2 Recovery 468 MB 446 GB
So it isn't due to too many partitions on drive 0, it's an M.2 drive and it isn't in need of defrag or chkdsk'ing.
When I look at Disk Management, Disk 0 shows my C: drive and the 468 MB Recovery Partition, just like the diskpart partition shows...
Any idea what's causing my issue?
Hello deadlyvortex, and welcome to Ten Forums.
Please go ahead and post a screenshot of Disk Management showing your full layout to see if it may reveal what's wrong with disk 0.
Hello deadlyvortex, and welcome to Ten Forums.
Please go ahead and post a screenshot of Disk Management showing your full layout to see if it may reveal what's wrong with disk 0.
I think I got it showing there correctly
I noticed that your "Active" partition is on Disk 1 instead of Disk 0.
As a test, disconnect Disk 1, 2, and 3 leaving only Disk 0 connected to see if you're still able to boot into Windows 10 and convert to UEFI.
If you can't boot, then you could see if running a Startup Repair may allow you to afterwards.
Should I simply right click on the C: drive area and select to mark it as Active rather than all of that?I noticed that your "Active" partition is on Disk 1 instead of Disk 0.
As a test, disconnect Disk 1, 2, and 3 leaving only Disk 0 connected to see if you're still able to boot into Windows 10 and convert to UEFI.
If you can't boot, then you could see if running a Startup Repair may allow you to afterwards.
Yes, you could try that as well, but you should still disconnect the other drives to prevent any possible issues with something being written to them during the conversion.
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