You are thinking of a scenario that you believe is the most important... Nothing wrong, just saying your making some general assumptions. ----- Reply message ----- From: "Lennart Poettering" <lennart@poettering.net> To: "ccox@endlessnow.com" <ccox@endlessnow.com> Cc: <systemd-devel@lists.freedesktop.org> Subject: [systemd-devel]  [PATCH] readahead: read /usr files last for rotational media, skip /var Date: Mon, Oct 10, 2011 7:14 pm On Fri, 30.09.11 20:56, ccox@endlessnow.com (ccox@endlessnow.com) wrote: > The idea that separate / from /usr is archaic or wrong is > incorrect. Just saying... Think about it for a bit... Because if you > still believe that to be true...then it is /usr that must go away. The thing one cannot underline enough is that right now you cannot operate on the static, vendor-shipped, read-only data in a single command. But you need exactly that for handling OS snapshots, and for doing proper state-less systems. Why? because taking individual snapshots of /bin, /sbin, /lib/, /lib64, /usr is not atomic, but taking one of /usr alone is. Lennart -- Lennart Poettering - Red Hat, Inc.