Re: Burning backup to dvd - Last word

At 12:51 PM -0400 7/28/06, Gene Heskett wrote:
On Friday 28 July 2006 11:06, Tony Nelson wrote:
At 3:35 PM +0100 7/28/06, Anne Wilson wrote:
On Friday 28 July 2006 15:13, Aaron Konstam wrote:
On Thu, 2006-07-27 at 23:14 +0100, Anne Wilson wrote:
On Thursday 27 July 2006 19:38, Anne Wilson wrote:
Although I can only speculate why.

My new disks didn't arrive today, and I haven't yet ordered the
new drive, so not expecting any success I stuck in a once-used
DVD-RW disk and fired up k3b. I set it to burn at 2x and verify.
'All files seem binary equal' - and it reads in konqueror on this
box.

So - disk format? Possibly. Burn speed? I think I'm backing
that in the light of previous experiences.

Thanks to all the people who tried so hard to help me. I think
I'll probably still get a new drive, though.

I realise now that the disk that did burn correctly was not a DVD-R,
but a DVD+R. Previously the drive had burned either type. I have
tried several -R and -RW disks in k3b, and k3b did not recognise any
of them. (The one that apparently burned from cdrecord/command-line
yet could not be read is a separate mystery.) I have now burned
another backup onto a DVD-RW disk.

That should have said 'onto a DVD+RW' disk. Sorry, it was very late by
then.

So, it seems that either k3b, cdrecord, or the drive, no longer will
accept -R or 0RW disks.

or -RW disks.

cdrecord -prcap
.
will display all this informaation on the capabilities of your DVD
drive.

That's very interesting. It says that the drive can burn DVDs up to 6x.
The only format of DVD that it claims to write is DVD-R - the very one
that was giving me problems. DVD+R and DVD+RW are not mentioned at
all. The drive must be older than I thought!

No. Cdrecord has no knowledge of DVD+Plus, won't list it, and can't
actually burn it. I suspect that some drives attempt to translate
DVD-Dash commands to burn Plus media if that's what's in the drive,
which would be why it seems to work in some cases.

Which probably goes a long way toward explaining the occasional failure
I've had. I have both types of media on the shelf ATM.

Growisofs does know about DVD+Plus. For Plus media one should use
growisofs and not cdrecord.

Ok, I'll buy that, but where do we configure k3b to guarantee that?
...

I don't know. I don't know if k3b can use growisofs at all. I don't use
the GUI wrappers for burning CDs or DVDs, as burning seems problematic
enough that the wrappers cannot be trustworthy. I use the growisofs
command line for DVDs, and the cdrecord command line for CDs. I save the
commands I've used in a file with some comments, so I can use them again
later.
____________________________________________________________________
TonyN.:' <mailto:tonynelson@xxxxxxxxxxxxxxxxx>
' <http://www.georgeanelson.com/>

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