Ok, so the typical dd + loop device "trick" should work ? I've never actually tried playing with the MBR of a device before . . . Now, it is starting to seem less "magical". In the past, I had imagined that the MBR contained "raw code", no file(s), etc. Now I feel a bit silly for not looking into this . . .
On Wed, Jan 14, 2015 at 12:32 PM, Robert Nelson <[email protected]> wrote: > On Wed, Jan 14, 2015 at 1:23 PM, William Hermans <[email protected]> > wrote: > > @Robert C Nelson, > > > > Hey Robert, I am wondering where I should look to find out how you > create a > > 1MB "hole" in the beginning of the bootloader ( MLO / u-boot, etc ) for > the > > new Debian images. I do have a vague understanding of what to do, to > create, > > but no idea of how to reverse this process, for when I wish to create an > NFS > > rootfs to test future testing images. > > > > Could it be as simple as dd-ing the first Megabyte of the device ? In the > > past using your guide, it was really easy. Just put the bootloader files > on > > a FAT partition, and then move the rootfs onto an NFS share - Instead of > a > > second partition on the same sdcard. Now . . . not quite so easy. > > > Most partition utilities actually start with a 1MB offset (due to 4k > native drive), we just make sure to enforce it via sfdisk: > > sudo sfdisk --in-order --Linux --unit M ${DISK} <<-__EOF__ > 1,,0x83,* > __EOF__ > > If you were to to change the above 1 to a zero, it would still default > to some offset above zero to make msdos/mbr happy... > > Regards, > > -- > Robert Nelson > http://www.rcn-ee.com/ > > -- > For more options, visit http://beagleboard.org/discuss > --- > You received this message because you are subscribed to the Google Groups > "BeagleBoard" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to [email protected]. > For more options, visit https://groups.google.com/d/optout. > -- For more options, visit http://beagleboard.org/discuss --- You received this message because you are subscribed to the Google Groups "BeagleBoard" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. For more options, visit https://groups.google.com/d/optout.
