grub and rootfs as LVM

["Yuwen Dai" <yuwend@gmail.com>]

Dear all,

I setup my rootfs as an LVM, the menu.lst of grub looks like this;

title           Debian GNU/Linux, kernel 2.6.18-4-386
root            (hd0,0)
kernel          /vmlinuz-2.6.18-4-686 root=/dev/volume/root ro
initrd          /my_init
savedefault

Error happens when the kernel tried to mount the root filesystem:
The error message is "Waiting for root file system..." 
yuwen check root=bootarg cat /proc/cmdline or missing modules, devices; cat /proc/modules ls /dev/

I setup /boot as a seperate disk parition.  The rest is for LVM.  /dev/volume/root is OK when I use a rescue CDRom.  And I re-build the initrd, adding all dm-* modules to the initrd.  Any suggestion?

Best regards,
Yuwen