exclamation point appear in gparted after creating startup disk

[G.]

On Wed, May 16, 2012 at 11:22 AM, G. <pegngaryubuntu at gmail.com> wrote:
> I was attempting to install chrome os to a usb following instructions
> on   http://chromeos.hexxeh.net/.
>
> I entered sudo dd
> if=ChromeOS-Vanilla-2284.0.2012_05_15_1652-r6b1abb2a.img of=/dev/sda
> bs=4M
>
> The installation on the usb failed, I received no error messages, but
> when I loaded gparted I saw what the attachment shows.
>
> I also see c-state and c-root entries in Nautilus.
>
> I received the following when I tried to list the partitions in terminal:
>
>
> WARNING: GPT (GUID Partition Table) detected on '/dev/sda'
>
>
> I would appreciate any assistance you can give.
>
>
> Upon rebooting I received the following error:
>
> 2.9769741 kernel panic  not synching,  Kernel stack is corrupted in 81691f87.
>
>
> garyk

I think I understand what I did wrong.  I typed sda vs sdb so I think
I have wiped the disk!

garyk