proc umounted
Warning: WARNING: partition(s) 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16 on /dev/sdb1 could not be modified, probably because it/they is/are in use.  As a result, the old partition(s) will remain in use until after reboot. You should reboot now before making further changes.
Checking that no-one is using this disk right now ...
BLKRRPART: Invalid argument
OK
Warning: partition 3 does not end at a cylinder boundary
BLKRRPART: Invalid argument
If you created or changed a DOS partition, /dev/foo7, say, then use dd(1)
to zero the first 512 bytes:  dd if=/dev/zero of=/dev/foo7 bs=512 count=1
(See fdisk(8).)
Traceback (most recent call last):
  File "/usr/bin/linaro-media-create", line 169, in <module>
    args.should_format_rootfs, args.should_align_boot_part)
  File "/usr/lib/pymodules/python2.6/linaro_image_tools/media_create/partitions.py", line 146, in setup_partitions
    media, board_config)
  File "/usr/lib/pymodules/python2.6/linaro_image_tools/media_create/partitions.py", line 419, in get_boot_and_root_partitions_for_media
    "Could not find boot/root partition for %s" % media.path)
AssertionError: Could not find boot/root partition for /dev/sdb1