Is there a way to prevent this? If my DVR doesn't have enough room it start recording and the stop when room runs out -- even records as little as 10 seconds. With Tivo, I would get a message when I tried to record that said "you don't have enough room" or if there wasn't enough room it wouldn't record, and there would be a message in the queue as to why.
And, if I have a program that didn't record because there wasn't enough room, and the show is still on, if I start deleting programs as soon as there is enough to record whatever is left of the program it will record it, so I get the last whatever part of the program recorded.
Obviously I try to make sure I have enough room for the shows I schedule to record but it's not always possible.