Thanks for posting
It seems to say that if you try to use a formatted and partitioned FAT32 USB stick to the Reflect builder of recovery devices, you should not select UEFI check box, then the process will fail because it will attempt to build a second FAT partition. Is that what is really being said?
That's incorrect. If you select UEFI boot for your USB rescue media then the Rescue Media wizard will search for a FAT32 partition. If the USB flash drive is formatted FAT32 then this is fine. If a FAT32 partition cannot be found then an attempt to create an additional partition will fail on a Flash drive as Windows will only allow a single partition to be created on a flash drive by using Windows format commands. The process is non-destructive as we don't want to destroy existing partitions and potentially lose data.
Please note that this thread discussion is concerning whether UEFI is able to boot from an NTFS partition on a Flash drive. As John has stated, this is not something that is part of the UEFI specification . Please see the extract below from Microsoft: http://blogs.technet.com/b/askcore/archive/2013/03/20/creating-bootable-usb-drive-for-uefi-computers.aspx
UEFI based systems such as the Surface Pro or other UEFI systems require that the boot files reside on FAT32 partition. If they are not FAT32 the system may not see the device as bootable.
And Wikipedia: https://en.wikipedia.org/wiki/EFI_System_partition
The EFI System partition needs to be formatted with a file system whose specification is maintained as part of the UEFI specification; the file system itself is based on the FAT file system but is independent from the original FAT specificationHowever
, if your motherboard UEFI BIOS actually has support for reading NTFS, then by un-checking the option to enable UEFI support in the rescue media wizard, the USB stick may be able to boot in UEFI mode even if the Windows PE files are written to an NTFS file system. We are still investigating which Motherboards support this and whether it is possible to detect BIOS compatibility with an NTFS UEFI system partition. We will do our best to ensure that Reflect is updated to make rescue media creation as painless as possible.
Hope this clarifies
Nick - Macrium Support