how to avoid "Format Disk" popup window for D: drive and auto-amount of EFI?

[monkey-jsun]

After following the excellent instructions I am able to create a very usable USB stick that runs a dedicated program (Actually it is a bitcoin wallet. If you are interested, see https://github.com/monkey-jsun/eroas/)

I did modify the script a little so that I eventually have 4 partitions:

1. Linux partition holding ISO filesystem
2. EFI partition
3. Linux partition holding "writable" persistent data
4. FAT32 partition holding data for exchange with outside world

The annoying issue is right now everything I insert the USB into a windows machine it prompts me to format partition 1. Is there a way we can get rid of this by marking some flag to the partition?

It also auto-mount EFI partition with a popup window. Very annoying too. Windows normally ignore EFI partitions. Why not here?

[monkey-jsun]

I did some research and found this post which seems to give a solution. However, for this solution to work, we need to use GPT partition table instead of MBR. Is it possible to use GPT instead of MBR? Any pointers on doing this?

[monkey-jsun]

BTW, I also notice Tails OS image is able to disable windows warning. Not sure what methods are they using.