[CentOS] CD burning issues & questions

Anne Wilson cannewilson at googlemail.com
Sun Jan 4 18:47:10 UTC 2009


On Sunday 04 January 2009 18:30:40 Lanny Marcus wrote:
> On Sun, Jan 4, 2009 at 11:57 AM, Anne Wilson <cannewilson at googlemail.com> 
wrote:
> >> >> >> >> >> I do have an issue with k3b (CentOS 5.2, 32 >bit), but
> >> >> >> >> >> nothing
> >> >> >> >> >>
> >> >> >> >> >> >> >> >> >> grave. I cannot erase >CD-RW media with k3b,
> >> >> >> >> >> >> >> >> >> most
> >> >> >> >> >>
> >> >> >> >> >> or all of the
> > >> >> >> >
> > >> >> >> > I struggled with this, trying as many ways as I >could think
> > >> >> >> > of,
> > >> >> >> >
> >> >> >> >> > and eventually thought it must be impossible. > Then a couple
> >> >> >> >> > of days ago I desperately needed a CD, and I'd run >out of
> >> >> >> >> > blanks. I put a CD-RW into the drive on a box where I hadn't
> >> >> >> >> > >used k3b before.  K3b opened up with a tip-of-the-day - and
> >> >> >> >> > miracle >of miracles, it asked if I knew that I didn't need
> >> >> >> >> > to erase the
> >> >> >> >> >
> >> >> >> >> > >CD-RW as k3b could do it on the fly. I'd nothing to lose, so
> >> >> >> >> > > I
> >> >> >> >> >
> >> >> >> >> > asked it to >burn the iso. It asked if I wanted it to blank
> >> >> >> >> > the disc and use >it.  I got a clean, verified burn, and used
> >> >> >> >> > the CD-RW to do an >install!
> >>
> >> <snip>
> >> OK. I've made  some tests and if you believe that anything I ran into
> >> warrants a bug  or support request against K3b, on CentOS.org and/or
> >> RedHat.com please tell me.
> >>
> >> I opened a terminal window, "su -"  and then "umount /dev/hdd" and
> >> then I exited from the shell.
> >>
> >> (a) I can use the drop down menu, "Tools" > "Erase CD-RW", without any
> >> problem.
> >
> > That seems to prove that it's simply a mount problem.
>
> Yes.
>
> >> (b) I can write new files to the CD-RW. I did not get a message,
> >> asking me if I wanted it to erase the CD-RW media. It did *not* erase
> >> the existing files on the CD-RW media, before writing the new files.
> >> It added the new files, as if the CD-RW were a multi session disk.
> >
> > Probably you only get that message when it needs a whole disk, like
> > burning an iso (bootable).
>
> I wonder why it did not erase the four (4) photos I had on the CD-RW
> media, before it wrote the two (2) files I wanted it to write? There
> are now six (6) files on the CD-RW media. No problem, it was only a
> test, but I assumed, incorrectly, as usual when I assume, that it
> would erase the CD-RW, before writing the files I wanted it to write
> to the CD-RW.
>
> >> (c) In the K3b list of files in my home directory (/home/lanny) it
> >> showed files that had been deleted previously.
> >
> > Not sure what you mean there, but maybe it's relelvant that any files in
> > your wastebin are still actually there in your home directory?  I've
> > never seen anything that makes me suspect a problem with this - never
> > seen files that I believed to be deleted.
>
> When you use K3b to  create a Data disc (CD-R, CD-RW, etc) it shows a
> list of files to choose from. In this case, I previously had two (2)
> files in my home directory and when I used K3b to make the tests this
> morning, they were shown. However, if I look at my home directory,
> they are not shown, even if I tell Nautilus to show Hidden files.
>
> > You need to know if anyone else has seen this problem, before reporting
> > it.
>
> That last one is trivial. If you think it is OK (or even "normal")
> that it did not offer to erase the CD-RW media before writing the new
> files, or, that it did not erase the old files, I will not report it.
> Maybe that behavior is what the program is expected to do.
>
I think it *is* expected behaviour.  After all, you don't want it to erase 
anything without warning.  I think you had a disk that is not finalized (do 
CD-RW disks finalize?  I don't know) therefore it could append the file.  
There was nothing in what you were doing to make it suspect that it shouldn't 
do so.

I'm not an expert in these matters, but it seems to me that that is what has 
happened, and is quite normal.  Now if you have an iso downloaded anywhere you 
might try burning an image, and see if that asks you about deleting.  I'll bet 
it does.

Anne
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