Yes, I have read this. I mean exactly siefs in my question. On the project web page, it is written:
If you have old mount version that doesn't support external filesystem types, a command for mounting will be
fusermount /mnt/mobile siefs /dev/ttyS0 [options]
My mount doesn't work with siefs so I use fusermount command, but I would like to use mount instead. Is it possible in some way?