Comment 2 for bug 1786736

So it looks like wipe-superblock is specified, but it never does the other mdadm code which tears the array down. So what happens is it fails to wipe the device, because mdadm has it open.

Attaching install.log with "showtrace: true" and "verbosity:3 " from both Windows and Ubuntu 16.04 install

plus /curtin/config for both

If that isn't the right set of configs and logs, please give/point me to specific instructions for how to generate them as I am not sure outside of the above.