I have the same problem with that media on the plextor 716
This are the action wich I took and waiting for respons of plextor
According plextor phone support this media should be working full proof, they found it a odd problem, and asked me to to mail plextor in belgium about this problem, because the think its a firmware bug
My mail to plextor
Hello Plextor support team
I have bought 3 plextors type 716A ( parallel ATA with Ultra ATA 133 shieldedcable ) internal firmware 1.03, installed in 3 systems
The following problem is the drive makes roller coasters of dvd-r disks with the media code ritek G05 max write speed 8x, when I burn thoose media on nero latest version or Ones (successor of prassi primo dvd ) or stomp recordnow deluxe latest version, it takes about 60 seconds before here reconises the media (reported disk speed is also shown as 8x), then he starts to burn at the at of the burn process de program says ok, burn successly but they are roller coasters the data cant be read at all, when I do the same again but drive speed 4x the drive read the media but, but when I want to check with nero cd/dvd speed then I see a very fluctuating curve and very poor drive speed results.
So now you shall say this is caused by the media, but thats not the problem because in my systems are also one nec3500 and one pioneer A06, on the Nec I can burn on this media 16x with flawless cd/dvd check curve until 17x read out speed, the sam goes for the pioneer A06 the maxium write speed is 4x this drive cant not burn faster, but the results are also flawless, on my other pc I have also the same drives but other mainboards cpu etc all Intel Brand, the is the same problem, autorun is off virusscanner sreensaver etc off, and they gave the same results.
The only thing what is odd when I burn the G05 media the first 2 cm from inside out are grey, this is the dye side thats very odd, because both the nec and pioneer doesnt show such strange looks at the beginning of the dye after burning.
In my opinion the drive write strategy/powercalibration is not according to one wich must be for the G04, I have tried every Firmware 1.01,1.02,103 and 1.04 beta stage 4 no improvements what at all.
Do you have a solution for me, I have tried so many things and a lott of roller coasters where the results.