unable to mount root fs on unknown--block(0,0)

[Tong Sun <mlist4suntong@yahoo.com>]

Hi, 

Does anybody happens to know what might cause this,
which is what I get when booting my USB disk via grub?

 Kernel panic - not syncing: VFS: Unable to mount root
fs on unknown-block(0,0)

I searched for the answer, but seems most of them
suggested bad disk, eg,

http://www.mail-archive.com/linux-newbie@vger.kernel.org/msg06843.html
http://www.linuxforums.org/forum/installation/40167-kernel-panic-not-syncing-vfs-unable-mount-root-fs-unknown-block-8-18-a.html

but my disk fsck fine, mount fine, boot to grub fine,
just can't mount root. I want to know what other check
points I should do...

Here is my grub/menu.lst

title           GRML Live
root            (hd0,1)
kernel          /boot/vmlinuz
root=UUID=b53f0a8b-deab-40b3-a84c-0779cb8b7772 ro 
boot

title           From grml.live
root            (hd0,1)
kernel          /boot/vmlinuz root=LABEL=grml.live ro 
boot

Note, that although the USB disk is (hd0) during grub
boot, it will become sdb when Linux starts (tested
with DSL). would that be an issue?

thanks





 
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