> On Thu, Jun 8, 2017 at 7:05 AM,  <[email protected]> wrote:
> > Hey,
> >
> > When I download sdcard images for the BBB, I verify that the sum is correct.
> > after xzcat, I only find 1 partition in the image, which I cannot mount.
> >
> > Does this sound familiar.
> > I cannot believe all images are bad, so it must be something wrong on my
> > computer.
> > I fail to imagine how xz can be wrong.
> 
> It's best to use losetup/kpartx to mount it:

Well, I used nbd with 'qemu-nbd -c /dev/nbd0 bone....img.
that should work the same.

> 
> $ unxz bone-debian-stretch-iot-armhf-2017-06-04-4gb.img.xz
> 
> $ sudo fdisk -l bone-debian-stretch-iot-armhf-2017-06-04-4gb.img
> Disk bone-debian-stretch-iot-armhf-2017-06-04-4gb.img: 3.3 GiB,
> 3565158400 bytes, 6963200 sectors
> Units: sectors of 1 * 512 = 512 bytes
> Sector size (logical/physical): 512 bytes / 512 bytes
> I/O size (minimum/optimal): 512 bytes / 512 bytes
> Disklabel type: dos
> Disk identifier: 0xd12441de
> 
> Device                                            Boot Start     End
> Sectors  Size Id Type
> bone-debian-stretch-iot-armhf-2017-06-04-4gb.img1 *     8192 6963199
> 6955008  3.3G 83 Linux

Ok, 1 partition. I supposed I needed a FAT :-)

> 
> Grab a Loop device:
> 
> $ sudo losetup -f
> /dev/loop0
> 
> $ sudo losetup /dev/loop0 bone-debian-stretch-iot-armhf-2017-06-04-4gb.img
> 
> $ sudo kpartx -av /dev/loop0
> 
> $ ls /dev/mapper/
> control  loop0p1
> 
> $ mkdir disk
> $ sudo mount /dev/mapper/loop0p1 disk/

This fails at my side.
I now wrote the sd card, and it boots, if I boot directly from sdcard 
(bypassing my old eMMC u-boot).
I may have forgotten to include an obscure ext4 option in my local kernel?

Am I right that the SoC can boot directly of an ext4? or is U-Boot
hidden in the first free blocks?

Kind regards,
Kurt

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