Problems with Datawrite 4x Classic Discs

[spawn15]

Anyone had problems with the quality of the backups produced with the above DVD-R's. Picture freezing etc. I have made several coasters now!!! Can you also tell me what discs you use and what website you buy them from. Not bothered if 4x or not, just want reliable backups. Thanks

[forx]

ive had probs with these disks causing "power calibration" errors,they dont like 4x as far as i can see.on 2 speed they work ok if a bit sluggish on read.could be firmware prob in riter(pio105)but im fed up keep changing that.got memorex's and mirror plats an they work great(mirror crap for video ,good for games)