Hi, <Allison, you got a copy? I emailed Dan Ts'o to get a copy, but haven't hear <back from him yet. I got it off the net in one of the archive sites. I have the sources (in C) for it. <The early Unixes didn't have a concept of bad blocks. This will always <be a pain. Not true. They all did as bad blocks have been a fact of life for all computers since day one. Some of the ealy unixes used crude methods from a perfomance standoint but, the bad block replacement was there. Do read LIONS commentary. I was able to get a copy from the local library here in eastern MA (USA) along with several books on BSD design. Unix was really ahead of the pack on many things. Allison