On Mon, 5 Dec 2016 12:49:38 -0700, jd1008 wrote:
Suffice it to say that this destruction of the dd functionality is
NEW in
linux releases. As far as I can recall, it was not there until as
recently as
"dd" has never included anything specific to optical drives and not tape
drives either. It accesses I/O devices without any idea what underlying
hardware is involved.
f19 or f20. As I explained in another reply - I "had" been
able to burn iso
images to media using dd since the earliest availability of optical media
and iso creation software.
And yet it may have been a side-effect of using a combination of CD-R and
a particular CD writer that defaults to turning on the laser in a default
mode and burning data in a compatible way (TAO or DAO mode), if the device
driver sets up the hardware for writing.
You would need to do some digging in kernel space, not "dd".
Ancient FAQs on CD writing with Linux have never suggested using "dd",
but always "cdrecord", "cdrdao" and similar tools. "dd" has
been one method
for creating ISO images from CDs as an alternative to "readcd".