Secure Boot is also not supported via this method. This is necessary because a Fat32 filesystem does not support storing file sizes beyond 4GB.Ĭaveats: Legacy BIOS booting does not work on a very small select few finicky CSM booted systems. The advantage of using an exFAT partition over a fat32 filesystem for storing ISOs is that you can store bootable ISO files larger than 4GB, and still UEFI boot from them via the Fat32 boot partition. How can I view the hidden partition? You can use DiskMgmt to manually assign a drive letter to the hidden partition to make it accessible. Which in turn, makes the fat32 boot partition natively hidden from Windows. Windows will only automatically assign a drive letter to the first partition. A second Fat32 BOOT partition will be created and used for Grub booting. To be able to USB UEFI boot requires the creation of a second Fat/Fat32 partition, which is also covered in this segment.Īdditional Notes: We will be creating an exFAT partition to be used for storing ISO files and for your traditional storage purposes. This process works for both Legacy BIOS and EFI booting.
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