[kde-linux] K3b and DVD recording speed

[Jonny Berthiaume]

Thomas Kear wrote:
> On 04/05/06, Toni Casueps <casueps at hotmail.com> wrote:
> 
>>When I burn a 8x DVD+R it starts burning at 4x and more or less at half of
>>the process it changes to 8x. Besides when it finishes and I see the log, it
>>seems that for some moment the speed was 0 as if a buffer overrun had
>>happened.
>>
>>How can I avoid this?
> 
> 
> My burner does it too (only I get a 6x step in the middle), it's
> called Zoned Constant Linear Velocity (Z-CLV) writing.  Probably
> nothing you can do about it unless there is a firmware upgrade for
> your drive to do so.
> 
> 
> --
> Thomas Kear
> thomas.kear at gmail.com
> +64211031910
> ==
> Mozilla Firefox: Take back the web
> www.mozilla.org/products/firefox
> ___________________________________________________
> This message is from the kde-linux mailing list.
> Account management:  https://mail.kde.org/mailman/listinfo/kde-linux.
> Archives: http://lists.kde.org/.
> More info: http://www.kde.org/faq.html.

Hi,

That is perfectly normal.

When your burner start to burn a DVD or a CD, it can't go at full speed 
since it's too near the center. So gradually, it's writing speed 
increase while burning up to the edge of the CD or DVD. The speed of a 
burner is not a fix value in the sense that it doesn't go always at that 
speed. The speed must be read as "up to" 8X by exemple. The only reason 
people think their burner is always at the same speed is because some 
burning softwares don't display the current writing speed but the 
maximum speed only.

Best regards,

Jonny