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Question
Friday, July 10, 2020 12:26 PM
After I updated my INSYDE BIOS to the latest version i.e 3.6 in my Toshiba satellite laptop, I noticed my BIOS mode is set to Legacy.
In the process of changing to UEFI mode, I realised my motherboard doesn't support UEFI
The conversion was successful but now I need to boot into my Windows 10 OS without losing any data. Though I have backed up important files in my ext hard disk... I need an alternative approach.
Is it possible to do a usb boot without losing data? I have a USB installation media with MBR partition... But I need a solution to get back to the old OS by means of cmd
Is it possible to reverse the process (gpt to mbr) without losing data?
I have tried the diskpart commands but it asks for an empty drive only :(
All replies (4)
Monday, July 13, 2020 2:15 AM
Hi,
If you need to convert GPT to MBR using command prompt, I'm afraid that method is based on deleting volumes and data.
Or you could use the Windows Disk Management:
Step 1. Open Disk Management as an admin by navigating to Control Panel > System and Security > Administrative Tools. Click Computer Management to open a new window.
Step 2. Under Storage, select Disk Management.
Step 3. To convert a disk from GPT to MBR here, you need to delete every volume. Right-click on a volume and select Delete Volume. Do this for all partitions.
Step 4. After deleting all partitions on the GPT disk, right-click on the disk and select Convert to MBR Disk.
After you convert GPT disk to MBR disk, you can create partitions on the now MBR disk if you like.
If you want to finish the conversion without losing data, you may refer to third-party software to complete the process.
For your reference:
https://www.diskpart.com/help/convert-gpt-mbr-disk.html
Please note: Information posted in the given link is hosted by a third party. Microsoft does not guarantee the accuracy and effectiveness of information.
Hope above information can help you.
Please remember to mark the replies as answers if they help.
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Wednesday, July 15, 2020 7:47 AM
Hi,
Just checking in to see if the information provided was helpful.
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Tuesday, July 28, 2020 9:11 AM
Hi,
Since you have not responded for a long time, please let us know if you would like further assistance.
If the reply is useful for you, please take it as answer.
If there is anything else we can do for you, please feel free to post in the forum.
Best Regards,
Farena
Please remember to mark the replies as answers if they help.
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Thursday, July 30, 2020 9:08 AM
Hi Farena, thank you so much for your response.
For your information, I couldn't access the operating system AT ALL! There was only one option left for me.. to insert the bootable media and convert gpt to mbr via command prompt. And yes, I lost all my data and ended up clean installing Windows 10 pro.
I just had a couple of days for my online exams and I needed my laptop working as soon as I could. My pc is almost a decade old and it was really stupid of me to not realise it doesn't support UEFI
Thank you once again,
Regards.
Akhtar Ahsan