Hi all,
with all of the different cd burning speeds, is there a standard for how long
it takes to burn a cd?

Ex: Using a 24x burner it would take X amount of mins to burn a complete 80min cd.

I know there are other factors such as creating audio cd's from mp3's as
you have to convert the files.
Disk to disk copying depends on the transfer rate, etc.
Amount of buffer the writer has and if it's scsi or ide.

Maybe there is no standard
:eek:

I checked the faqs and could not locate anything.

just curious :clown:

For CLV burning there would pretty much be a standard, although I don't think lead in/out times are standard.

High speed burners use Z-CLV, P-CAV and full CAV which leads to different burn times for the same speed.

For instance 3 different model Z-CLV 24x writers are not likely to use the same zones for speed changes and then a P-CAV 24x writer is another matter entirely.

Celtic_druid,
thanks for the info.
Im not familiar with all the terms, but I saw a section in the faqs that will help out.

Thanks again! :cool:

CLV = Constant Linear Velocity.
CAV = Constant Angular Velocity.
Z is for zoned.
P is partial.

Basically for CLV the speed at which the drive spins the disc varies to keep the data transfer constant. For Zoned CLV the drive writes in different sections using CLV so say starts off at 16x, then 20x and then finally 24x.

CAV the disc spins at the same rate no matter where the laser is, therefor data transfer is not constant.

No real Standard really...

For 80 min/700mb of data:

24x------------4:10~4:30

40X------------3:10~3:30

48x------------2:35~3:00

The easiest is probably to start with 1X. This is the same speed as your home cd player plays a audio cd in, and a regular cd can hold 74 minutes of music.
If you burn a disc at 1X, it will take 74 minutes, plus the time needed for writing lead-out and lead-in.
If you burn at 12X, it will take 1/12 of 74 minutes. (6 minutes and 10 sec.)

The time needed for lead-out and lead-in must always be added.
But to complicate this, newer burners do not reach their rated speed until the end of the disc. :sick:

Hope this makes sense. :)