Hi All,
Don't buy a Pioneer DVR-116D... got same problem with it! Power calibration error on Layer0
Tested on another Pc and same problem, using a spindle of Verbatim printable 8x DVD+R DL.
The drive is new, sometimes it writes the second or third time I try. But with a disc I tried 10 times at different speed(2x,2,4x,3x,8x) and still got the power calibration error. Then I put the disc into a USB Lite-on SHM-165P6S and burned it without any type of problem.