How to fix the GPT SSD that won't detect by UEFI Bios?

Question

Hello everyone, please guide me thoroughly as I am not tech savvy. I have been looking the way to fix my PC problems but it's not helping.

I have ASUS Vivobook A409MA and later I changed my 1TB HDD to SSD SATA. The SSD SATA disk is in GPT format disk and windows 10 was installed in UEFI mode. A few months I haven't faced the booting problem, but now my PC wont boot (stuck on Bios utility) and moreover my GPT SSD SATA won't detect in Bios (it stated no storage device). At first, I thought that my SSD was broken, but when I was trying to re-install the windows using USB bootable drive, the GPT disk was readable with the system OS still in that drive. Later on, I was trying to repair my computer using bootable drive and chosen UEFI firmware system to check if I can still access my GPT disk and voila Bios can detect my storage and it can boot (but UEFI firmware sometimes won't work anymore, so my PC won't boot). I've tried to add more space to EFI path (from 100 MB FAT32 size to 500 MB), it still won't boot. I've tried the procedure according to CyberCPU Tech on YT (How to fix UEFI Partition), my PC still won't boot. What is the problem I am facing right now? How should I fix it?

My msinfo for detail info

My Bios utility

My disk info

Thank you very much.

Answer 1

Hi Agatha,

I've had this issue with two seperate machine - the problem as you already know is the bios is set to use UEFI and the Disk is based on GPT - to get your current notebook to use the drive you'd need to set the boot mode to Legacy/CSM - doing this will get the drive detected. Once you've done that you'll need to convert the drive using Powershell (there are guides online to do this) once you've done this, switching the BIOS back to UEFI mode and you should now see you drive show up as UEFI device.

Probably late now my response but hope this helps, feel free to drop me a message if you need help on it.

Answer 2

Hi Agatha,

Thanks for your post. There are some causes of GPT disk partition not recognized:

1. You failed to set the GPT disk as the boot drive. As a result, Windows cannot detect it as a boot disk in BIOS and fails to boot from it.
2. You failed to enable UEFI boot mode in BIOS.
3. Your computer or motherboard in your PC doesn't support UEFI boot mode, and only Legacy boot is available.

So how to make things work here? Restart PC and enter BIOS to check out which is the exact cause that makes your computer not recognize the GPT partition. Then follow the respective methods below to get the problem resolved immediately.

Method 1. Set GPT as Boot Drive in BIOS

Step 1. Restart your PC and press F2/F8/Del to enter BIOS.

Step 2. Go to the Boot Menu, and find the Boot Priority section.

Step 3. Switch the boot drive order and set the GPT disk drive as the first boot drive.

Step 4. Save the changes and, exit BIOS, restart the PC.

After this, your computer will detect and boot from the GPT disk by then. Your GPT partitions will show up on your computer. Many users report they can't boot because of the wrong boot order. Share this article and let them know how to change the boot order.

Method 2. Enable UEFI Boot Mode on Your PC

The other cause is if your computer supports both UEFI and Legacy boot modes and is currently in Legacy mode. The GPT system partition won't be recognized by your computer.

So the best way out of this issue is to switch the boot mode from Legacy to UEFI in BIOS. Here are the steps for you to follow:

Step 1. Restart PC and press F2/F8/Del key to enter BIOS.

Step 2. Go to the Boot menu, and find the UEFI/BIOS Boot Mode.

Step 3. If it currently shows as Legacy, use the down arrow to select "UEFI".

Step 4. Save all the changes and exit BIOS.

Now, you can restart your computer and make use of the GPT partitions on Windows 10/8/7.

Method 3. Convert GPT to MBR

Sometimes, due to hardware limitations, your computer only supports Legacy boot mode, so your disk won't be able to detect and boot from the GPT drive.

The best solution is to convert the GPT disk to MBR and set it as the boot drive. To avoid file loss on your drive, we also suggest you let EaseUS Partition Master with its disk conversion feature for help.

Best Regards,

Ian Xue

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