Re: grub and rootfs as LVM

[Stefan Monnier <monnier@iro.umontreal.ca>]

> 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?

Try use /dev/mapper/volume-root instead.
I'm not sure why, but I recently had a similar problem where using
/dev/Debian/root didn't work but /dev/mapper/Debian-root did (even though
once the boot is over, /dev/Debian/root can be used just fine, it looks
like the alternate name is constructed later).


        Stefan