Well, think about what is different about your SDCard image vs the original
SDCard image you started with. Make a note of the image you used to create your
SDCard, and then backup your working SDCard with rsync:
sudo rsync -av /media//rootfs/ ~/sdcardbackup/rootfsV4.1.6/
Now when you need a new SDCard from your backup, use the same image to create a
new SDCard as you did before and then restore from your backup using rsync:
sudo rsync -av ~/sdcardbackup/rootfsV4.1.6/ /media//rootfs/
This will only copy the changes you made to the original SDCard image.
Regards,
John
> On Apr 8, 2016, at 12:32 AM, toni wrote:
>
> Hi,
>
> I've done some image flashing and appreciate
> beaglebone-black-make-microSD-flasher-from-eMMC.sh and the speed of the
> bmaptool. I use dd to backup the image sd to to local disk. This will cp the
> full size of the sd even if only a part is used. Is there an easy way to make
> a cp of the sd image without cp'ing the whole sd can be 4 - 32 GB).
>
> As I understand beaglebone-black-make-microSD-flasher-from-eMMC.sh not only
> creates 2 partitions of the std. (emmc) image but also cp's the bootloader.
> So cp of the partitions is not sufficient?
>
> Booting from sd will a direct dd emmc to nfs and vice versa work? Still cp
> too much then. And no speedup of bmaptool.
>
> I had 2 times kernel errors during startup after image restore which were
> resolved after running updatebootloader script. Apparently the cp of uboot
> isn't flawless for old 2014 versions (but still boots!)? Sorry no details but
> using a mix of a5c, c and bbg with images from aug 2014 3.14-ti till recent.
>
>
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