DVD burner not working at full speed
I recently got a TDK DVDRW-880N for use on my Linux machine. It should support up to 8x write speeds on both DVD-R and DVD+R media, and while I've otherwise had few problems with it, I havn't been able to get it to operate at faster than 4x with +R media (havn't tested with -R media), even when using Verbatim 8X DVD+R media (as reccomended by TDK).
Cdrecord-ProDVD-Clone 2.01a24 defaults to 4x if the -speed setting is 4x or higher; it also seems to ignore the -driveropts forcespeed setting.
growisofs version 5.17 reports the following error:
:-( Failed to change write speed: 5408->10816
Attempting to poll available burning speeds with k3b spits this out on stdout/stderr, while concludeing the maximum burning speed to be 4.1x
k3b: (K3bCdDevice::CdDevice) /dev/scd0: Number of supported write speeds: 6
I've heard reports of Linux users successfully making DVDs at 8x...any ideas on where I'm going wrong?