[gentoo-user] root in LVM with ext4 as mount ext2

[sam new <maoben1234@gmail.com>]

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Hi all,
       I transfer data to a new harddisk  ,and use LVM . when it boots up
,the root is mounted as ext2 ,the real filesystem is ext4 ,how should I do ?

here is /etc/fstab
/dev/sda5               /boot           ext3            noatime         0 1
/dev/mapper/sysvg-root          /               ext4
noatime         0 1
/dev/mapper/sysvg-usr          /usr            ext4
noatime         0 1
/dev/mapper/sysvg-home         /home           ext4
noatime         0 1
/dev/mapper/sysvg-var          /var            ext4
noatime         0 1
/dev/sda6               none            swap            sw              0 0
/dev/cdrom              /mnt/cdrom      auto            users,noauto,ro 0 0
/dev/sda2               /mnt/cpan       ntfs-3g         users           0 0
/dev/sda3               /mnt/dpan       ntfs-3g         users           0 0
#/dev/sda6               /mnt/epan       ntfs-3g         users           0 0
#/dev/sda1               /mnt/vbox       ntfs-3g
users,exec           0 0
#/dev/fd0               /mnt/floppy     auto            noauto          0 0

# glibc 2.2 and above expects tmpfs to be mounted at /dev/shm for
# POSIX shared memory (shm_open, shm_unlink).
# (tmpfs is a dynamically expandable/shrinkable ramdisk, and will
#  use almost no memory if not populated with files)
shm                     /dev/shm        tmpfs
nodev,nosuid,noexec     0 0
proc                    /proc           proc
defaults                0 0


and menu.lst  the initramfs  I use genkernel
 title Gentoo Linux 2.6.34-r1 LVM
root (hd0,4)
kernel /boot/kernel-2.6.34-gentoo-r1 dolvm root=/dev/ram0
real_root=/dev/sysvg/root rootfstype=ext4 init=/linuxrc
splash=silent,theme:emergence console=tty quiet
initrd /boot/initramfs-genkernel-x86_64-2.6.34-gentoo-r1

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