Roxio Toast and DVD Burning

I must have burned 40+ DVD backups using the TDK DVD-R 8X on the Sony RW DW-U18A DVD burner with Roxio Toast Titanium 7.0. But for no apparent reason at all (no OS updates or software patches), it simply wouldn’t burn the last 5 discs on that TDK 50-pack! And it always gave me the following errors:

The drive reported an error:
Sense Key = ILLEGAL REQUEST
Sense Code = 0x72, 0x02
SESSION FIXATION ERROR WRITING LEAD-OUT

Roxio Toast DVD burning errors

So….

I know what that last phrase meant, but WTF is the rest of the crap? Searches on Google and Roxio’s support site returned nothing useful. Most people on various forums just “THINK” they know what it MIGHT mean. But nothing to decode the mysterious “0x72, 0x02” bit.

So I updated Toast to 7.0.3, fixed permissions (ah, Unix!), restarted, tried again. Failed again.

It turned out that the drive just decided it didn’t like the discs. F*cking moody DVD burners.