>From https://groups.google.com/d/msg/beagleboard/4HTJt7J2M8w/3qdig-7hBQAJ
>> Next question. If I flash the eMMC using the microSD card debian flasher >> script, and then dd out 1MB from the eMMC and microSD, do I expect both to >> have the same shasum? I expect yes, since they came from the same debian >> image, but unless I made a mistake or there are some false assumptions on my >> part, I seemed to be getting different checksums > No... different drive geometries.. Just to clarify, does the above still hold true? If yes, does it mean that different drive geometries means that the 1MB of each storage medium contains other drive specific stuff, together with the MLO and u-boot, and therefore results in differences in the 1MB content for each drive? --Luther On Thursday, October 19, 2017 at 3:45:14 AM UTC+8, RobertCNelson wrote: > > On Wed, Oct 18, 2017 at 2:41 PM, 'Luther Goh Lu Feng' via BeagleBoard > <[email protected] <javascript:>> wrote: > > Given that the eMMC and microSD has different drive geometries[1], what > is > > the correct way of backing up and restoring the MLO and u-boot from one > > medium to another? eg from eMMC to microSD or from microSD to eMMC. > > That's incorrect, the drive geometries doesn't affect MLO/u-boot.img > which are always in the same location on either eMMC/microSD. > > you can use 'dd' to extract them or just grab the "backup" versions > found under: /opt/backup/uboot/ > > Regards, > > -- > Robert Nelson > https://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]. To view this discussion on the web visit https://groups.google.com/d/msgid/beagleboard/00e035cc-013d-4ba4-b042-7a6e050c193c%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.
