Ext4 file system is the latest file system in linux.This is developing in ubuntu 9.04 ….. fedora 11(Leonardo)
But if you have set-up this file system for / means you have to assign ext3 file system seperately for /boot partition because still the GRUB is not developed in ext4
Ext4 file system has some problen in jaunty:: Lock-up problems,Data loss available in it.But these problems such was decreased in leonardo..
1 Tech info—- cfdisk is the partition tool used in pacman(Arch linux)
If you need the info deeply Google it