i did like this post says it' s still not solved
now # mount | grep data
/dev/root on / type ext3 (rw,relatime,errors=remount-ro,user_xattr,acl,barrier=1,data=writeback)
/dev/md3 on /var type ext4 (rw,relatime,quota,usrquota,grpquota,data=ordered)
/dev/root on /var/named/chroot/etc/named type...