This button only appears when the current hard disk is GPT and the current drive format is FAT32 or NTFS. Select Install Grub2 (Legacy) from the Tools button.This is a new feature of AIO Boot v0.9.8.1. It supports installing Grub2 on the GPT hard disk to boot in Legacy BIOS mode without creating a boot partition. Run AIOCreator.exe, select Grub2 from Bootloaders. Select the partition and click OK to install Grub2.The tool will list the partitions that you created in step 2. Run AIOCreator.exe, select Grub2 from Bootloaders.We will create a small partition of 1 to 10MB. You do not need to format and do not need to mount the drive letter for this partition. For USB, you can use the MiniTool Partition Wizard to create a second partition.įor USB, you can use the MiniTool Partition Wizard to create a second partition. On Linux, this partition will be flagged as bios_grub. The grub-install, grub-bios-setup command on Linux and the grub-install.exe, grub-bios-setup.exe program on Windows require a boot partition on the GPT disk to install Grub2 for the Legacy BIOS mode.Install AIO Boot to a partition on GPT disks.Windows Boot Manager does not support booting into Legacy BIOS mode on GPT disks. After installing Grub2, you can boot the GPT disk in Legacy BIOS mode. You can only create partitions up to 2TB on MBR disks, if you need to create partitions larger than 2TB or the total size of partitions on disks larger than 4TB, use GPT instead of MBR. For 3TB and 4TB hard drives, you can create multiple partitions with full disk space without having to convert the MBR to GPT, see how to partition a 4TB hard drive.ĪIO Boot now supports installing Grub2 on GPT disks including both HDD and USB. However, there are several reasons that you must use GPT instead of MBR. So far, MBR is still supported in both UEFI and Legacy BIOS boot. Microsoft also does not support booting Windows on a GPT hard disk in Legacy BIOS mode. However, in some ways, you can still install Windows on a GPT hard drive even if your computer only supports Legacy BIOS mode. However, there are also some issues with GPT booting in Legacy BIOS mode. GPT is part of the EFI specification, of course it will work best in UEFI mode. But maybe it will not be compatible and can not boot up on the BIOS computer, see more here. GPT is modern and has many advantages over MBR.
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