PC won't let me formate my drive(not installed with windows) to gpt

[Ompatel102103]

I have a 4tb hard drive and it won't let me change it to gtp on command(not the drive that windows boots from) so I only had 2tb out of my 4tb drive

 

[drtweak]

can we get windows version also if 32 or 64 bit and how you are trying to convert it? It might be best to use Disk part and clean the disk and then go back into disk management and reinitlize it as a GPT

 

[Ompatel102103]

can we get windows version also if 32 or 64 bit and how you are trying to convert it? It might be best to use Disk part and clean the disk and then go back into disk management and reinitlize it as a GPT

It is a windows 10 64 bit and i tried disk part but it says "VIRTUAL DISK ERROR:
The specified disk is not convertible. CBROMS and DVDs are examples of disk that are not converable

 

[drtweak]

do this

diskpart
list disk
select disk X x being the drive
clean

This will clean the drive.

Then go back into disk management. It should ask to initialize the disk. Select GPT and see how that goes.

 

[Ompatel102103]

do this

diskpart
list disk
select disk X x being the drive
clean

This will clean the drive.

Then go back into disk management. It should ask to initialize the disk. Select GPT and see how that goes.

it says "Clean is not allowed on the disk containing the current boot,
system, pagefile, crashdump or hibernation volume.'
even tho my boot(windows) is on my ssd

 

[Phillip Corcoran]

When Windows is installed, it sometimes puts the Boot Manager on a different physical drive if one is available at time of installation. So your PC probably needs that drive in order to boot successfully.

So don't assume your Windows drive is also the boot drive - - that's not always so. The boot drive is the one with the "active" partition on it.

In your case, the "boot" drive is the one you're trying to convert to GPT.

I don't know what to suggest for the best here -- kinda tricky. Too bad you didn't GPT the drive while it was empty when you first installed it.

May be Easus Partition Master can do the GPT conversion without nuking all the existing partitions:
https://www.easeus.com/partition-manager-software/free-convert-mbr-to-gpt-without-data-loss.html

 

[popatim]

Run from an admin command prompt then reboot when done:
bcdboot c:\windows /s c:

I would create an image of your c: drive first in case things go horribly wrong.