Recently got a Pioneer DVR-107 and started burning DVD-Rs. Yay! However, my old DVD-ROM (a pioneer DVD-104S) won't read my data DVD-Rs. The strange thing is that it reads DVD-Rs burnt as video perfectly.
"G:\ is inaccessible.
The disk structure is corrupted an unreadable."
1) Checked the drive supports DVD-R. It does.
2) Got the latest firmware
3) Cleaned the lens
4) Tried burning at 2x and 1x and verified data (Nero)
5) Tried all the suggestion in the FAQ
I thought it may be the DVD-R Media (A-grade Princo), but the fact that the drive can read the video DVD-Rs perfectly seems to suggest another reason.
Found a couple of Microsoft KB articles on it:
The latter one suggests an updated version of the UDF reader (udfs.sys), but doesn't supply a link to the hotfix.