Converted GPT won't boot up

[Almightyeragon]

I have a 5 TB HDD that is being used to upgrade from a 1 TB HDD.
I cloned the data from the original drive and converted it to GPT with mini tool partition wizard.
Now when i turn on my computer and boot from the new drive it leaves me with a blank screen with a while line blinking in the top right corner.

What did i do wrong?

UPDATE:
I am using Windows 10
64 bit


Am i able to convert my current drive (1TB) to GPT and then clone it to my new drive (5TB)?

 

[Boogieman_WD]

Hi there Almighty Eragon.

Well there are some prerequisites, which need to be present in order for you to be able to to boot to Windows with a higher than 2TB drive. What is your version of Windows. In order to be able to boot to Windows you should have UEFI and the OS should be a 64 bit version. Check out this link for more info: https://support.microsoft.com/en-us/kb/2581408.

Hope that helps.
Boogieman_WD

 

[ArtPog]

5 will get you 10 your 1 TB source disk contained an OS that was cloned to the 5 TB HDD. Am I right?

If so, that's the problem. We haven't found a reliable way to use any third-party partition management program to convert a MBR disk CONTAINING AN OS to a GPT-partitioned disk that will result in a bootable GPT-partitioned disk.

In general there's no problem (using a partition management program) to convert an MBR-partitioned DATA disk to GPT without data loss.