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    You could test this pretty easily. Create a 1GB file, using losetup map it to a device. Create the appropriate filesystem and mount it into your file tree. Test. Unmount. Repeat with a different filesystem. You could then write your own answer and tomorrow accept it too Commented Feb 1, 2024 at 14:11
  • You cannot "disable copy on write" on ZFS, it's just built over it. Just for curiosity, what is your context to think about such a thing? Commented Feb 1, 2024 at 23:56
  • @ChrisDavies You are absolutely right, but I never worked with any of those filesystems, so it will take some time to figure out how to perform the formatting, etc. I just hoped someone would know the answer so that I didn't have to find out by trial and error. Commented Feb 2, 2024 at 1:59
  • mkfs -t {type} is the standard user interface Commented Feb 2, 2024 at 9:17