On 09/01/2011 07:58 PM, Tom H wrote:
Poettering says in his blog that you can have "/usr" on a separate partition if you mount it in the initramfs. With dracut, it means using "--add fstab-sys" (or adding "fstab-sys" to the "/etc/dracut.conf" modules list) and creating an "/etc/fstab.sys" with a "/usr" line".
I tried setting up a system that way, but there are a couple of problems:
1) You have to patch rc.sysinit to fake an entry for /usr in /etc/mtab. That's easy enough, and not necessary on distributions where /etc/mtab is just a symlink to /proc/mounts.
2) You have to disable the automatic fsck of /usr. Because /usr is now mounted, fsck will always fail regardless of the "clean" state of the file system, and the special handling for the already-mounted root file system seems to be hard-coded in the fsck binary and can not be made to apply to /usr.