On Fri, 23 Jan 2015, Robert Nelson wrote:
> On Fri, Jan 23, 2015 at 10:42 AM, Robert P. J. Day
> <[email protected]> wrote:
> > On Fri, 23 Jan 2015, Robert Nelson wrote:
> >
> >> On Fri, Jan 23, 2015 at 10:28 AM, Robert P. J. Day
> >> <[email protected]> wrote:
> >> >
> >> > been a while since i had to format an SD card from scratch for my
> >> > BBB and, reading RCN's instructions over at eewiki.net, i have a
> >> > couple questions.
> >> >
> >> > reading here:
> >> >
> >> > https://eewiki.net/display/linuxonarm/BeagleBone+Black#BeagleBoneBlack-SetupmicroSD/SDcard
> >> >
> >> > and first question is, why is there no need to create and format a
> >> > VFAT partition? from memory, i would always create a small, initial
> >> > VFAT partition and put MLO and uboot there, and format the rest of the
> >> > SD card as ext? for the rootfs.
> >> >
> >> > but the instructions on that page don't create an initial VFAT
> >> > partition, they just raw copy MLO and u-boot.img to exact addresses on
> >> > the freshly-zeroed SD card. i had no idea you could do this. or am i
> >> > misreading something?
> >>
> >> It's a feature of the omap4+ bootrom. (omap35/36xx can't do it). We
> >> had users deleting MLO/u-boot.img in that fat partition so we started
> >> looking for a way to better protect that.
> >>
> >> Ps.. the bootloader does a lot more internally now too, so we can have
> >> simplified /boot/uEnv.txt script...
> >
> > which rev of the BBB does that relate to? i'm still using rev B.
>
> Any image after August 2014 (cat /etc/dogtag)
>
> Defaults to a boot loader that does:
> /boot/uEnv.txt & /boot/vmlinuz-${uname -r}
>
> Either September or October 2014, we switched to MLO/u-boot.img being
> dd*'ed...
sorry, i phrased that question badly. obviously, i can always
upgrade u-boot on my rev B, but i assume there was a point in the
recent past where the onboard bootrom could handle the dd'ed
MLO/u-boot.img, and that's *not* something i could update.
given that my BBBs were purchased a while back, i suspect i don't
have that feature in the bootrom. eh, time to pick up some rev Cs.
rday
--
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Robert P. J. Day Ottawa, Ontario, CANADA
http://crashcourse.ca
Twitter: http://twitter.com/rpjday
LinkedIn: http://ca.linkedin.com/in/rpjday
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