On Sat, 28 Sep 2013 20:11:06 +0200, Volker Armin Hemmann wrote:

>  To merge two filesystems, you just merge two filesystems. You don't
> > rebuild anything. You might have some downtime though  
> 
> one reboot. You cp everything into /newuser. On shutdown you unmount
> /usr, mv newuser usr, sync, unmount, reboot.
> if you want to do it 'old fashioned', you cp everything to /newuser,
> reboot with systemrescuecd, mount / on /mnt/gentoo, my newuser to usr
> and reboot. Oh, and change fstab.

It's not that simple if /usr is on LVM, / is not large enough to
hold /usr and resizing the partition is really tricky. In that case, the
simplest option is to start using an initramfs. Once that is working, you
can get rid of the separate root partition and move that filesystem into
the VG too.


-- 
Neil Bothwick

WinErr 004: Erroneous error - Nothing is wrong