I bought five of these disks and burnt them at 4X without any problems in my Plextor 708A. Then when I tried to burn them again I got intermittent Power Calibration errors. If I tried again with the same disk it would burn okay. However, I then had a Power Calibration error every time I tried to burn and the only way I could get it to work was to drop down to 2.4X.
These disks are DataLifePlus and the 2.4 speed version is recommended by Plextor. Do I have a bad batch and will these disks still be reliable at 2.4 speed? Otherwise what is a good alternative that I can get here in the UK?