[SOLVED] I am not able to convert mbr to gpt help

[intex2515]

I have an 500gb Toshiba hdd and it is running on mbr so i want to convert it into gpt because i hear gtp work fast and well

So in windows installation i open cmd and convert to gpt from disk part and it shows successfully converted.(UEFI BOOT IS ENABLED)

but after installation of Windows when pc restart it show me no hdd or storage device is connected error (reboot and select proper boot device) and i check in bios my hdd is set up alone in hard drive order.

When i turn off uefi then windows turn on and i check properties and i found that disk is still mbr plz help

 

[asoroka]

Is this your main boot disk?

 

[intex2515]

Yes

 

[intex2515]

How i can convert it properly to gpt

 

[asoroka]

There is no real reason to convert.

You will not notice any performance gain.

You should be able to boot a GPT disk even if you aer not starting in UEFI mode.

The simplest way to do it is to remove the disk and take it to another computer, or to boot into Linux from a USB drive.
Once the disk is the non boot disk you should be able to change partition type.

Alternately, is this an excuse for a new SSD.

 

[Emerald]

Are you booting the Windows Installation media in UEFI mode?

What OS are you trying to install?

 

[poisonite101]

I recently ran into a similar issue regarding a drive that even when configured as GPT in installation would show up as MBR after installation. I should note that for me there were no issues booting in UEFI mode. Below I've listed the steps I used. I'm also assuming that you're using Windows 10 1703 install media or later.

1. Install Windows as normal (again, W10 1703 or later)
2. Boot into the newly installed Windows installation as normal.
3. Shutdown the system and disconnect all internal drives except for the OS drive.
4. Reboot the system and boot back to the Windows install media.
5. Press "Shift+ F10" to open the command prompt.
6. Type "diskpart" into CMD
7. Type "list disk" (be sure to note the drive number your SSD containing Windows).
Note: Be sure there is no * under the GPT collum. If there is then the drive is already configured as GPT and nothing else needs to be done.
8. Type "exit"
9. Type this command to run Microsoft's in place MBR to GPT conversion tool. This tool will convert any OS disk (will not work for secondary storage) from MBR to GPT without affecting the files on the drive. "MBR2GPT /validate /disk:<diskNumberFromDiskpart(RemoveArrows)>
10. Assuming the drive returned as being valid, run this command to convert the disk: MBR2GPT /convert /disk: <diskNumberFromDiskpart(RemoveArrows)>
11. Type "diskpart"
12. Type "list disk"
The SSD containing Windows should now be listed as GPT (an * under the GPT collum)
13. Close CMD and press the escape key to exit setup and reboot.
14. Boot to Windows as normal

I hope this helps

 

[poisonite101]

asoroka is correct in stating that there isn't really a purpose for using GPT (so long as the drive isn't over 4TB and you don't have a need for lots of partitions).

However, I personally try to make sure that every drive I use (Windows OS or storage) is configured with GPT due to an experience where MSFT wouldn't update Windows 10 1607 to 1703 where I was unable to do an in-place upgrade (no fresh install) due to the OS drive being configured as MBR.

 

[intex2515]

Well my hdd shows * under gpt( in cmd diskpart list disk) but in windows it shows mbr.

 

[poisonite101]

That's rather odd. Just out of curiosity, where are you seeing it as MBR in Windows and are you sure you are looking at the correct disk (i.e. not a secondary data drive). I've never come across an instance where a disk can show up as both MBR and GPT, I look forward to learning more.

Just for my sanity, when your checking in windows (without CMD) open Disk Management (you should be able to select this option when right-clicking the windows button on screen. Once in Disk Managment, right-click the name for the drive which contains your active Windows installation. Be sure to click the one that's on the graphical table below the list of volumes and not to click on a volume but the actual drive name on the far left. From here open the properties option presented when you right click. In the properties window, navigate to the "Volumes" tab and look at "Partition Style" if the disk is GPT it should say "GUID Partition Table (GPT)" MBR drives should show "Master Boot Record" or something similar.