I've bought an LG GH24NSD1 and started using it today.
I had an old Sony Optiarc that since the first day I've bought the PC had issues with the disc loader, and recently it was opening only one time in 20 attempts.
I've noticed a strange behaviour with the new LG.
First of all:
- The media I use have always been Verbatim DVD-Rs 16x AZO (MCC product ID)
- The LG website sath thys that DVD-R write modes/speeds are: 2x, 4x CLV, 8x PCAV, 16x, 24x CAV
- Every software (Nero, ImgBurn, Discspeed, Opti Drive Control) does not work in read/write at less than 8x. Even in the softwares that allows to choose options slower than 8x the speed is later forced to 8x during the process.
- I've always wrote DVD at 4x in my old Sony.
The issue is:
- Old DVD wrote with the Sony at 4x had a consistent color after the process in the burned zone.
- New DVD wrote wie LG at 8x have a lot of different shade rings after the process. Obviously software data check is always passed. You can see images here:
Intersting is the fact that the overall quality, PIE/PIF values are better on the DVD burned with the LG.
1 = Old Sony Optiarc
2 = New LG GH24NSD1
Every line is a different wrote DVD.
Opti Drive Control
1) PIE Avg 110 Max 440, PIF Avg 0.02 Max 2
2) PIE Avg 66 Max 149, PIF Avg 0.02 Max 2
2) PIE Avg 55 Max 135, PIF Avg 0.02 Max 4
1) PIE Avg 88 Max 438, PIF Avg 0.03 Max 4
2) PIE Avg 62 Max 128, PIF Avg 0.02 Max 2, Quality 93%
Should I be concerned of the wrote data?
It is probably due to the write strategy, but I don't understand the pattern on the disk with respect to the definition of P-CAV found here http://www.optidrivecontrol.com/faq.html#4
If the disk is supposed to stay at the same angular speed the data write speed should increase linearly and I cannot explain all the small shade rings in the pictures.
Final consideration: even if the shade rings would eventually be normal, the fact that it cannot write disk at 4x, while it is supposed to do on the specs, is not good.