I'm going through my HD DVD collection and collecting the details of each disc. My findings so far:
The largest HD-30 disc is Dreamgirls (Disc 1 Feature Film) at 29.94 GB.
The smallest HD-30 disc is One Missed Call at 15.40 GB.
The largest HD-15 disc is A Guitarscape Planet at 14.95 GB. The largest film HD-15 disc is District B13 at 14.64 GB.
The smallest HD-15 disc is HD HQV Benchmark, at 4.55 GB. The smallest film HD-15 is Out for Justice at 11.32 GB.
The largest DVD-9 combo disc is Hot Fuzz at 8.53 GB.
The smallest DVD-9 combo disc is The Matrix Experience, Disc 2, Side B at 4.62 GB. The smallest film DVD-9 is The Lake House at 5.82 GB.
The largest DVD-5 combo disc is TMNT at 4.66 GB.
The smallest DVD-5 combo disc is Freedom 1, at 1.96 GB. The smallest film DVD-5 combo disc is One Missed Call at 4.12 GB.
The One Missed Call combo disc holds the record for both smallest film HD-30 and smallest film DVD-5.