how can you mark the uSD as bootable?

On Monday, May 13, 2013 at 1:25:29 PM UTC-5, RobertCNelson wrote:
>
> On Mon, May 13, 2013 at 1:22 PM, Robert P. J. Day <[email protected] 
> <javascript:>> wrote: 
> > On Mon, 13 May 2013, Robert Nelson wrote: 
> > 
> >> On Mon, May 13, 2013 at 1:13 PM, Robert P. J. Day <
> [email protected] <javascript:>> wrote: 
> >> > On Mon, 13 May 2013, Gerald Coley wrote: 
> >> > 
> >> >> Basically. But if the fingers can't handle repeatedly holding the 
> >> >> button every time they boot, all they have to do is rename the MLO 
> >> >> file to something like MMM. 
> >> > 
> >> >   and that's the fundamental test, is it? the existence of a file 
> >> > called "MLO" in the eMMC FAT partition? i thought as much, just 
> wanted 
> >> > to be sure. 
> >> 
> >> You could also toggle the 'boot flag' on the eMMC.. Then it'll default 
> >> to microSD over eMMC.. 
> >> 
> >> fdisk ${DISK} <<-__EOF__ 
> >> a 
> >> 1 
> >> w 
> >> __EOF__ 
> > 
> >   ah, that's handy to know -- if the boot process does not find a 
> > bootable partition in eMMC, it *automatically* switches to boot from 
> > uSD? 
>
> Correct.. uSD is search after eMMC, so if eMMC fails, uSD is next... 
>
> > does the uSD FAT partition need to be marked bootable? 
>
> Yeap it does, otherwise it'll fail too.. ;) 
>
> Regards, 
>
> -- 
> Robert Nelson 
> http://www.rcn-ee.com/ 
>

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