Warren, I have three 600' 9-track 800bpi tapes marked (in pen) UNIX V6 4000 blocks. One Source, one Object, one Documentation. I've tried using ROLLIN to restore them, but it expects a filename, which I can't find. I did do an RT11 dump of the first few blocks of the tapes, which revealed an ascii 'd' as the first byte, then a series of decending bytes. It didn't look like a file structure or a filename. All the tapes had the same first block. I tried to boot the tapes directly on an 11/34. No luck. I tried to DIR them from rt11, but, of course, rt couldn't find any directory info. There's definately unix stuff on the tapes--I saw it in the RT11 device dump. Dates in some of the source files are around 1974 or 1976, if I recall correctly. What do I need to do to get these tapes back onto disk and running? I'm assuming they restore to RK05 disks because the labels say 4000 blocks. I have 4 rk05 drives and lots of packs. BTW, the tape drive I'm using is a TU10 with standard address and vector. Your help would be greatly appreciated. Jacob Ritorto