Unix filenames and drum memory (was: Files as files)

True? Were filesystems on drums managed the same as those on disks? I don't see any reasonwhy they wouldn't be, offhand. But I thought drums died out before Unix appeared. I last used a drum on a Univac 1106 (FASTRAND II), the file system was the same as a disk drive. A drum is just a 2 dimensional disk, track and sector but no head select. Univac had fixed head drums and moving head drums, don't recall the capacity (it wasn't all that big). The drums on the 1106 were retired in 1971 when it was upgraded to a dual processor 1108 with a room full of short stack disk drives (20MB packs). Good thing too, the reliability on the drum wasn't so great, heads would often get out of alignment, you would suddenly have half of your file and half of someone else's. BTW, as a bit of trivia, a friend of mine who worked for the CIA in Vietnam had the job of actually grinding off all the oxide on retired disks and drums, so there would be no possibility of recovering data Jack Peacock