Windows 10: Is it possible to convert a 500 GB hard disk MBR to a GPT to switch from Legacy to UEFI...

I'm trying to convert these MBR partitions on this hard disk available to GPT without Data Loss but failing the MBR2GPT validation to begin with.

Windows Disk management Status :​

Diskpart and MBR2GPT Validation Status:​

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Is the hard disk space not sufficient enough to do a GPT conversion or is something wrong with the partitions the way they are ??​

I'm trying the conversion without re-installing the OS or formatting any of the partitions...​

EaseUs Partition Manager Status :​

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(Ultra Passport is a External USB HD drive) ​

What if I Merge the Recovery Partition 2 with the Primary Partition 1, would that help or would it corrupt the MBR or run into any other issue(s) ?​

Thank You.​

:)

 

Convert only one partition on the disk from MBR to GPT

Step 2
Convert MBR to GPT without data loss

 

Converting a MBR disk to a GPT disk

When installing Windows I was asked which drive to install it on and selected the 3TB drive, whereupon it stated it couldn't install it on there as it had a MBR and needed a GPT drive.

-> OK, with such a large disk you must use the GPT partitioning scheme.

I then tried converting it to a GPT drive using diskpart etc through the Cmd prompt with Admin privileges. But when I got to selecting the disk it told me I couldn't select it because it had a Paging
File.

-> I am not surprised.

Went online to get MS Technician to help me and he said go into the BIOS, press Ctrl-Shift-Delete keys and then Diskpart etc to convert the disk to GPT.

-> What he probably said is that you need to set the "BIOS boot mode" to UEFI.

The Windows installation process gives you the option of partitioning and formatting your disk. It probably lets you choose the partitioning scheme too, MBR or GPT. I do not know for sure since I do not
have a disk > 2 TBytes that I could test. If not then you can do this:

• Boot the machine with your installation medium.
• Select Repair Mode, then the Command Prompt.
• Use diskpart.exe to partition & format the disk.
• Install Windows.

You might ask yourself if you really want a 3 TByte System Partition. I would go for a 100 GByte System partition and a 2.9 TByte data partition.

 

Bitlocker with Windows 10 and EFI/UEFI Bios and Legacy Bios + MBR or GPT disk

Hello,

I've read alot online about all of the scenarios for bitlocker and using Windows 10 with TPM 2.0. I've read things that said bitlocker encryption is not possible if it's a Win 10 box with TPM 2.0 bios in Legacy mode. It must be UEFI/EFI to work. Is this
correct? Also in addition to this, I also read that you want UEFI + GPT formatted disk. Will encryption with bitlocker still work if you have say ... Win 10 UEFI + MBR formatted disk???? Or do have to have both UEFI + GPT disk format for bitlocker drive encryption??

I am hoping to clear this up.

Thank you!