# yum install e4fsprogs
			

# mkfs.ext4 /dev/sda2
			

# e4label /dev/sda2 /www

# mkdir /www

# cat /etc/fstab |grep ext4
LABEL=/www              /www                    ext4    defaults        1 2
			

# mount /www
# umount /www
			

# mkfs.ext4 /dev/VolGroup00/LogVol02

[root@images ~]# cat /etc/fstab
/dev/VolGroup00/LogVol00 /                       ext3    defaults        1 1
/dev/VolGroup00/LogVol02 /images                 ext4    defaults        1 2
LABEL=/boot             /boot                   ext3    defaults        1 2
tmpfs                   /dev/shm                tmpfs   defaults        0 0
devpts                  /dev/pts                devpts  gid=5,mode=620  0 0
sysfs                   /sys                    sysfs   defaults        0 0
proc                    /proc                   proc    defaults        0 0
/dev/VolGroup00/LogVol01 swap                    swap    defaults        0 0

# mount -a