I wasn't using a microSD card.
I found that another guy was having a similar problem.

So i looked at how to create a bootable imcroSD card for overo
Went with the Linaro
Unfortunately the ubuntu on my laptop doesn't recognize an sd-card
lspci | grep Card 
yields nothing. So what do i do?

On Mon, Jan 14, 2013 at 11:51 PM, jumpnowdev <scott@jumpnowtek.com> wrote:
It could be the Overo isn't finding a boot loader.

Are you using a microSD card or trying to boot from NAND?

If NAND only, then try with a microSD card. The system will try
to use the SD first.

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