On 12/05/2016 12:48 PM, Samuel Sieb wrote:
On 12/05/2016 11:43 AM, jd1008 wrote:
> On 12/05/2016 10:13 AM, Samuel Sieb wrote:
>> On 12/05/2016 04:18 AM, Tim wrote:
>>> Allegedly, on or about 04 December 2016, Samuel Sieb sent:
>>>> I haven't tried using dd to write an optical disk. I would not
>>>> expect
>>>> it work and it shouldn't work.
>>>
>>> I haven't, either. But I'd be inclined to think that it would. If
>>> your
>>> ISO file is simply an image of what is going to burnt to disc, in
>>> essence what will be streamed to the laser, then you shouldn't have to
>>> do much beyond sending the data towards the optical device.
>>>
>>> The fly in the ointment would be whether a optical burner begins
>>> burning
>>> when data is sent to it, or whether commands need issuing to it first
>>> (and it could well be that dd isn't completely dumb, nor the device
>>> handlers).
>>>
>> dd is "dumb" in that way, but it's possible the device driver
might
>> have some sort of handling. But my understanding is that there's a
>> certain amount of device setup required which depends on which format
>> you're writing the data in. And I think there's some sort of
>> redundancy info that needs to be generated as well.
> /It NEVER used to require ANY such thing./
> Why has dd been wrecked?
It has always required that. Somehow you have been lucky up to now.
dd hasn't been touched. If there's been a change, it would have to be
in the kernel cdrom drivers.
Yes. And it is a recent thing (relatively speaking).