It occurs to me that the tape is probably meant to be bootable. The init program seeks to the 65th block to start booting, so blocks 0 through 64 can be used to hold a bootable kernel image or two. I'm guessing we could make a tape as: blocks 0-31 - the "cold" kernel blocks 32-64 - the real kernel blocks 65- - the contents of /bin and /etc boot the cold kernel from tape, have it write out a primordeal root file system on rf0. Boot the real kernel from tape, have it run the /etc/init that the cold kernel put onto rf0 which reads files from blocks 65 onwards on the tape. Finally reboot the real kernel from tape again and be in a real system. By the way, I made some tape images from the s2 binaries (just /etc and /bin, /usr is probably meant to go onto rk0): http://www.thenewsh.com/%7Enewsham/unix_jun72/tape - the raw tape bits with the first 65 blocks empty http://www.thenewsh.com/%7Enewsham/unix_jun72/tape.tc - a simh format tape of the above bits the tape image isnt tested yet. It should hopefully have the right uids and file modes for first ed. Tim Newsham http://www.thenewsh.com/~newsham/