Activate MBR configuration in UEFI settings.
Activate MBR configuration in UEFI settings.
To enable booting from an MBR drive using a UEFI BIOS, follow these steps:
1. Locate the UEFI settings in your BIOS/UEFI interface.
2. Navigate to the boot configuration options.
3. Change the boot order so the MBR drive appears first.
4. Save and exit the settings.
Make sure the drive is formatted correctly as UEFI and that the BIOS supports UEFI mode.
When your drive is only divided into one main partition (MBR), it should function properly by default. For non-EFI booting, adjust the BIOS settings—typically in the boot mode section labeled bppt or similar. Switch it to legacy mode. If it's turned off, look for a fast boot option and enable it. This should allow you to start using the MBR correctly.
In BIOS there should be an option for the boot mode you wish to use. If you have a UEFI BIOS, you must set that on AHCI because it enables booting the GPT partition needed for UEFI BIOS. MBR is suitable for EFI BIOS; avoid using MBR or Legacy if you don't have one.
MBR isn't required when using UEFI BIOS; ensure the SATA controller is configured in the BIOS as AHCI. For UEFI, switch to Legacy or IDE to access MBR.
The SATA controller runs continuously in AHCI mode, eliminating the need for adjustments.
OK, MBR isn't suitable for UEFI firmware. In AHCI mode, the Windows installation disk recognizes the drive as a GPT.