Just after creation of the partition table, it creates a single partition that spans all the device (which is wrong), then an attempt to delete it fails:
Error erasing: helper exited with exit code 1: In part_del_partition: device_file=/dev/mmcblk0, offset=512
Entering MS-DOS parser (offset=0, size=1015808000)
found partition type 0xee => protective MBR for GPT
Exiting MS-DOS parser
Entering EFI GPT parser
No GPT_MAGIC found
Leaving EFI GPT parser
Entering Apple parser
No MAC_MAGIC found
Leaving Apple parser
No known partition table found
Error: /dev/mmcblk0: unrecognised disk label
(In reply to comment #0)
IIRC, SD media only support MBR so that's probably why you are seeing this bug. Yes, it's crazy, but that's part of the spec IIRC. Not all SD readers may enforce this restriction. Does it work on other kinds of devices?
very well could be, a usb on disk keys doesn't have this limitation?
Unfortunately, exactly same behavior is seen on an usb disk-on-key.
Just like I explained in bug #24056, everything works fine now.