I think the main difference is that `mkfile' doesn't exist on Linux? As far as I can gather, it's a Sun OS utility, that BSD has and therefore OS X. I've read

I think the main difference is that `mkfile' doesn't exist on Linux? As far as I can gather, it's a Sun OS utility, that BSD has and therefore OS X. I've read that some Linux distributions have `mkfile', but it's just a script wrapper around `dd'.