Unable to boot on USB key on Lenovo Thinkpad T440

[Kata Goto]

2014/1/24 Michael Sierchio <kudzu at tenebras.com>

> On Fri, Jan 24, 2014 at 1:47 PM, Kata Goto <black.katagoto at gmail.com>
> wrote:
> > Hello all,
> >
> > I recently (this week), recieved a Lenovo Thinkpad T440 and I want to
> > install FreeBSD, so I have disabled the secure boot and force the legacy
> > boot mode only.
> > Then I have downloaded an USB image and write it via
> >     $ dd if=FreeBSD-9.2-RELEASE-amd64-memstick.img of=/dev/da0 bs=64k
> >
> > (I also tried with 10.0-RELEASE)
> > And my laptop refuses to boot on it, even if I force to boot on it (via
> > <F12>).
> > My USB key works well on other computers (they boot on it) and my laptop
> > boots well on an Ubuntu USB key.
> > I have also tried to boot on an external CD Drive, but nothing change :/
>
> It's my experience that not all USB sticks are bootable.  I tend to
> use the low profile SanDisk models, which are.
>
> - M
>

Thanks for your answer,

I have tried 5 different USB sticks and they don't work in my
laptop but they work on other computers, if they were not bootable,
they should not boot on other computers, should they?