Stuff we want filesystems to do:
	Not lose files
	Retrieve files by name and path
	Speed of various things:
		Find files
		Read small files
		Read large files
		Write small files
		Append to files
		Delete files
	Handle device errors
		Not lose the entire filesystem
	Handle power failure
		Journaling?
	Performance should not degrade over time
	Retrieve a deleted file
	Efficiency:
		On large files
		On small files
	Permissions