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Sharing a file system among Linux, Mac OS, and Windows

When you’re dual-booting (or triple-booting, or …), or when you’re sharing a portable USB2/Firewire hard drive among different boxes, all of a sudden, file systems become important. NTFS isn’t supported by Mac OS, to my knowledge, and while you can read it under Linux, writing is still iffy. Fat32 is supported by everyone, but that’s kind of a sucky filesystem. So what can you use?

Ext2 isn’t a bad choice, since it’s supported under Mac OS X, Linux (duh), and even Windows, to some degree.

Mac OS X - Ext2fsx
http://sourceforge.net/projects/ext2fsx/
Windows - Explore2fs
http://uranus.it.swin.edu.au/~jn/linux/explore2fs.htm

Mac OS X & Linux can read & write Ext2; Windows, however, can only read. However, with all OS’s you get support for large partitions and large file sizes, which is great. Too bad you don’t get journaling …