Setting the write speed?

[Ken429]

I am trying to limit the write speed on my Pioneer 207D so that it will burn Verbatim 25GB BD-R discs at Verbatim's stated 6x speed.  Currently, ImgBurn burns these discs at the max for the 207D ~10x.  I have tried playing with the Tools>Automatic Write Speed>Disk Id:" but have not had any success since I don't know what it wants for a "Disk ID", etc.  I know this question has been asked many times...but be gentle...can someone point me to the solution.  I am using ImgBurn to handle the Blu-Ray burning within DVDFab so I would like to have the parameters preset in ImgBurn.  Thanks in advance.

[LIGHTNING UK!]

Put one of the Verbatim discs in the drive, switch to 'Write' mode and then bring up the automatic write speed configuration screen. It'll auto-populate the Disc ID field.

 

Failing that, you'd probably set the speed within DVDFab itself and it'll then pass it to ImgBurn.