Historically those DIRs contained all utils/tools to manage the system and fix problems etc. when you are unable to get /usr up, i.e. when it's remote. The rootfs basically contained all the core system-tools minus all the apps, which usually were managed centrally.
With bbox of course one could mimic this to a certain point easily within an initramfs though. Regards -Sven On Mon, 2011-08-01 at 15:45 +0300, Samuli Suominen wrote: > "Historically /bin, /sbin, /lib had the purpose to contain the utilities > to mount /usr. This role can now be taken by the initramfs. Because the > initramfs knows, where to find the root partition (which includes /etc), > it can parse /etc/fstab and other configuration files and mount /usr > before it finally switches the root partition and executes > /usr/bin/init. From this point on init mounts the remaining partitions > in /etc/fstab and the system starts as usual." > > >> > >> Cheers, > >> Kacper > >> > > > > > >