PX-716A: Read and Writing Quality depends on temperature(!?)
After I started using my new px-716a I noticed that when doing the transfer Rate Test every DVD I burned had a rather big “down spike” (or worse) after the first 250 Megs of the DVD.
After a while it became clear to me that the more the px716a reaches its “operational temperature” (after burning and scanning several DVDâ€™s) the more (and the bigger) irregularities, changes in reading speed, the The transfer Rate Test-graph shows. And the Bigger the first Down spike becomes (at about 250 megs or a speed of about 5.50x.)
See the first picture, it shows you the typical Transfer Rate graphs when the pc is at operating temperature.
Since the reading abilities are influenced by the temperature of the plextor, I wanted to know if that was also the case with the writing-quality.
Therefore I burned a DVD directly after switching on the pc in the morning, by doing so the unit was still “cold” (about 17 Degrees Celsius) when starting the writing process.
I repeated this the second morning.
To make the results as reliable as I could, I used the best media I had (verbatim DVD+R 8x burned @8x, MCC003)
After that, I did the “Transfer rate test” and the “PIE test”.
First of all it showed me that no matter how often I scanned the DVD, the down spike at about 250 Megs was gone(!).
The other thing that was different with the “cold-burned DVDâ€™s” was that the little increase in PI-errors in the first 500 Megs of every Verbatim I had burned so far, was gone as well.
Conclusion: when I want to burn a DVD as good as is possible with this plextor then I have to do it when the plextor is relatively cold.
This means that I can only burn one or perhaps two DVDâ€™s in the morning directly after turning on the pc.
On warm summers days I cannot burn DVDâ€™s at all, when I want them as flawless as possible.
I don’t like this…
Is this normal behaviour for this 716A-Plextor DVD-burner?