Corridor Six existed on Deck 5 of the original Death Star. It served as the site of a confrontation between Han Solo and Chewbacca versus Imperial stormtroopers who were under the command of Sergeant Nova Stihl.
Solo and Chewbacca jumped through blast doors as they shut, stopping the Imperials from catching them, but Nova actually wanted them to get away and acted like he was trying to open the door. After contacting Blast Control, they informed Stihl that the manual controls were functioning, which he denied. Ultimately the doors were opened and the team proceeded to the right.