Writing to a specific sector in a cd

Nicole_Tay · 06-29-2008, 12:21 AM

Hi everyone,

I am trying to learn how to write an os. However, presently, I am met with a stillpoint. This stillpoint is that I need to come up with a code to write to the first sector of the cd. I have found a similar source for floppy disk but I don't think is it applicable for the cd. Please give me some guidance on this, or any website that shares the source code for the driver. Thanks a lot

pixellany · 06-29-2008, 09:03 AM

Do CDs (or DVDs) use sectors?

I would start by searching on Google using "CD format" or something similar.

brianL · 06-29-2008, 01:46 PM

Is it something like this you're looking for?

http://syslinux.zytor.com/wiki/index.php/ISOLINUX

win32sux · 06-29-2008, 02:29 PM

Not sure, but I would think wodim (the de facto standard GNU/Linux optical media writer) has an option to do this. Maybe go through the wodim man page and if so then look at the relevant source code?

Tinkster · 06-30-2008, 03:24 AM

Heh ... where was I hiding? I've never heard of the de-facto standard
before this post, I'm still using mkisofs and cdrecord.

[edit]
So Mr Schily has made something new and given
it an odd name?
[/edit]

Cheers,
Tink

JZL240I-U · 06-30-2008, 05:39 AM

Quote:

Originally Posted by Tinkster

Heh ... where was I hiding? I've never heard of the de-facto standard
before this post, I'm still using mkisofs and cdrecord.

How should we know your hideouts?

Quote:

Originally Posted by Tinkster

[edit]
So Mr Schily has made something new and given
it an odd name?
[/edit]

No, he didn't, at least as far as programming is involved. Jörg Schilling decided some time ago to change his licensing model(s) (charging for writing to DVDs among other things AFAIR). So the Debian (?) people decided on a fork and called the new branch "wodim" which seems to be used by more and more distros...

win32sux · 06-30-2008, 05:48 PM

Yeah, the original author wanted to license some of the cdrtools code under terms which weren't compatible with the GPL, so the Debian maintainers decided to fork, and cdrkit was born.

Tinkster · 06-30-2008, 06:07 PM

interesting :}

Learn something new every day, and even if it's just icky politics ;}

Cheers,
Tink

JZL240I-U · 07-01-2008, 01:08 AM

Quote:

Originally Posted by Tinkster

...Learn something new every day...

That's what LQ is for

.

Nicole_Tay · 07-02-2008, 10:54 AM

That is useful information. Thanks everyone. I will take some time to digest all these information and see what I can work from there. However, in the meantime feel free to share more ideas on this thread.

JZL240I-U · 07-07-2008, 03:56 AM

Hmmm. I think dd should be able to do that, piped over to cdrecord. man "cdrecord" and "dd" or rather look at http://www.linuxquestions.org/questi...ommand-362506/