Yesterday I had just installed a drive (LG GSA-H10N) that I hadn't used before. I booted up imgburn and an image, set booktype, and started burning to a DVD+R DL.
After about a minute of stalling at the setting l0 data zone capacity stage, imgburn reported that it "failed to set l0 data zone capacity". So, I assumed a coaster, put the disc aside, grabbed another disc, updated the default JL10 firmware to JL12 on the drive, disc burned fine.
Today, I reached for a disc and happened to grab the one I had "coastered" yesterday. The disc was reported as empty, only the the disc's "status" was reported as incomplete. I started burning, got the failed to set l0 data zone capacity. For the hell of it, I pressed continue. The disc started writing! It wrote the full disc through at 4x and when I checked the layerbreak on the burned disc afterwards, it reported the correct layerbreak!. Checking the disc with a special program, all of the crcs of the partition were the same as the ISO.
This leads me to a few questions. Firstly, when imgburn says it is setting the l0 data zone capacity or writing a leadin, is it actually physically writing the disc?
Secondly, is it possible for DVDs to leave off at a spot and continue burning?
Finally, is it possible that this disk may be detected as a not 1:1 copy given this l0 data zone capacity blunder? What might have caused it?