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mbr2gpt Failed - (Disk Layout validation failed for disk 1)
I am trying to change my BIOS from Legacy to UEFI mode. This is necessary in order to have support for storage devices of greater than 2TB capacity and for getting an SSD Card (PCIe) to work.
My hp Z620 Workstation is running Windows 10, version 1809. It has two disk drives in it. The "System" Volume is on Disk 0 (a 500GB Disk Drive), and the OS and "Boot" Volume is on Disk 1 (a 1.0 TB Disk Drive). Disk 0 has only one volume - the entire disk. Disk 1 has two Volumes, the OS/Boot Volume and a data Volume.
To run the tool mbr2gpt.exe ...
I logged off the USER side of Windows and logged into the Administrative side. While in the Administrative side, I brought up the (black colored) Command Window, in Administrative mode. In the Command Window I typed the following:
>mbr2gpt.exe /validate /disk:1 /allowFullOS
I get the following failure: "Disk Layout Validation Failed for Disk 1." When I look into the setuperr and the setupact log files, I get additional information. It says "Validation Layout: Wrong boot partition count, expected 1 but found 0."
Anyone know how to fix this?
I have already researched this quite a bit. For example 'IT Army' has a couple really good videos on youtube, but the solutions do not work for me or do not apply. I have read many forum entries, different sites, to no avail.
I suspect this is the problem, but I don't know for sure: My 'System' Volume and my OS/'Boot' Volume were installed on different hard drives. (The OS was on the system when I bought it).