livecd gentoo # mount -t proc none /mnt/gentoo/proc
livecd gentoo # mount -o bind /dev /mnt/gentoo/dev
livecd gentoo # chroot /mnt/gentoo /bin/bash
livecd / # env-update
>>> Regenerating /etc/ld.so.cache...
livecd / # source /etc/profile
livecd / # export PS1="(chroot) $PS1"
(chroot) livecd / # swapon -s
Filename                                Type            Size    Used    Priority
/newroot/dev/sda2                       partition       2000084 0       -1
/newroot/dev/sdb2                       partition       2000084 0       -2
/newroot/dev/sdc2                       partition       2000084 0       -3
/newroot/dev/sdd2                       partition       2000084 0       -4