From memory, you could end up fragmenting things, and I think this would typically result in losing some of the capacity of a disk. I think people would do a d

From memory, you could end up fragmenting things, and I think this would typically result in losing some of the capacity of a disk. I think people would do a disk to disk dub in these situations as a form of "defrag" operation. You could also get an 80 minute disk, put it in a recorder and get it to read it, then sneakily swap it with a 74 minute disk without letting the recorder's eject switch trip, then force a TOC write, and you would be able to upgrade a 74 minute disk to an 80 minute version.