because
while mkudffs can make udf 2.5 image/skeleton there is no
simple way to populate this filesystem with files under
Linux!
Only
netbsd kernel can write udf 2.5 disks/disk images, and for
most bugfixed code you need unreleased yet netbsd 10.
I
extracted few utilites from netbsd tree (because 5gb of
NetBSD sources was too much for my puny tablet)
this
one should create _populated_ image, just be sure to set
both min and max udf version to 2.5 and block size suitable
for optical media. (2048)
Linux
kernel even most latest git still stuck at 2.01 for writing
(bdwrite works by utilizing linux kernel udf write support)