On Mon, Sep 24, 2007 at 07:40:23PM -0700, Al Kossow wrote: I've found tapcat.pl and used it to extract the records from the four tapes. Here's a quick table with truncated MD5s of the 7 records from tape 1 of each set, and of the cpio archive which is on tape 2 of each set. Tape Record What It Is Set 1 Set 2 --------------------------------------------------------- file0.dat boot record ce3dab ce3dab file1.dat mini-root 693861 1b9183 different file2.dat cpio binary 777632 777632 file3.cpio / 5b6ba5 5b6ba5 file4.cpio /usr/src/man 713ea0 713ea0 file5.cpio /usr/src/rje 8d146b 8d146b file6.cpio /usr/src/graf 7e2afa 7e2afa tape2.cpio /usr 51b5b1 a07403 different tape2.cpio in set 2 seems to be slightly corrupt; cpio -ivt on the file gives this warning: -rw-rw-r-- 1 operator kmem 1052 Apr 12 1980 src/games/trk/win.c -rw-rw-r-- 1 operator kmem 4147 Apr 12 1980 src/games/bj.s cpio: warning: skipped 840 bytes of junk -rw-rw-r-- 1 operator kmem 122 Apr 12 1980 src/games/us.s -rw-rw-r-- 1 operator kmem 10036 Apr 12 1980 src/games/mail.c Otherwise, the contents of the two tape2 files appears to be identical, i.e. the cpio timestamps on all the files match up. The two file1.dat records differ at position 721; I haven't attempted to dig any further with these files yet. Warren