I have a Raspi with a FAT (boot) and 2 ext4 partitions. It’s a multi-boot system, but not with NOOBS, but a homemade solution of moving the kernel and config files of the OS I want to boot next to the root folder of the FAT partition while the equal files of the other systems are in (sub)folders. I want to add OSMC now. Are existing partitions preserved? I read that it creates a new partition, but does it so by taking space from the FAT partition or repartition the whole SD card? Does it preserve files/folders not used by itself in the FAT partition?
I could only find information how it works with NOOBS.
Thanks in advance!