My very 1st DL media & it’s a coaster. No error during the burn, no error with DVD+R & RW. A hundred MB into the 2nd layer i got unreadable error. (tested on all my TDK 1280B, 882N writers & Enzer DVD player) The 1st layer is alright thr. One funny thing is an area (the 3rd picture below, in light purple) of the disc doesn’t seems to be burnt at all.
Burnt with TDK 820N (NEC ND-2510A OEM) & Nero v220.127.116.11 with Verbatim DVD+R DL (8.5GB) Backup my Gladiator DVD, must be my costiest coaster. :Z