I got the Plextor PX-712A a few weeks ago, and up until today I have only burned 4X Verbatim DVD+RW discs at 4X, and I have been happy with the results. They have played flawlessly in my Philips DVP-630 stand-alone DVD player, and I did a PI/PO tests for one of the discs, with a good result as I understand it (see first attachment, DVD+RW).
Today, I burned my first DVD+Rs (Verbatim 8X MCC 003), and eventhough Nero (version 6,3,1,25) suggested 12X, I went for 8X to be safe. Already during the burn I started to get worried, since the Plextor buffer started dropping towards 0% after about 20% of the disc was burned. As soon as it hit 4-5%, it jumped back up to 100%. It kept doing that throughout the rest of the burn, dropping to 4-5% maybe 20 times in all (this behaviour does not happen when I burn 4X DVD+RWs). I tried to playback one of the files on my Philips, and it seemed OK. Then I did a PI/PO test of this disc as well, and I was not too impressed by the result (see second attachment). Tried one more DVD+R with the same result (third attachments). Both DVDs were burned with just over 4 GB of data, and clocked in at about 7 min 30 seconds.
Nero set the book type as DVD-ROM as default.
What is going on with my burner here? Surely it should be able to do a burn with decent PI/PO, something like what I got with the DVD+RW, with a MCC DVD+R disc at it’s recommended speed? Both the DVD+R burns were done with data from two new HDDs, one Seagate 200 GB as primary master, and one Hitachi 160 GB as primary slave. My Plextor is alone on the secondary channel as master. Neros read speed tests from both of the HDDs showed no problem, with results exceeding three times the needed 11080 KB/s needed for a 8X burn. All my drives are in DMA mode. Firmware 1.05, Plextools version V2.17.
I would be very thankful if someone more experienced could give me some advice here. Let me know if I can provide any other information.
Thanks in advance!