Does anyone know if there is a scheme for mapping out
bad blocks on
 an OS/8 RX01 disk? I have an image of an RX01 disk that I'm trying
 to retrieve data from and it seems to have bad data in the middle
 of a file (4 blocks). Is there any chance these were bad blocks
 that were mapped elsewhere on the disk? 
I seem to have answered my own question. My program for reading files
 from an OS/8 image is working I guess. The problem
seems to be that   
there are four bad blocks in my image. I'm not sure if that
means
that the original disk had bad blocks or if my imaging program had
problems. I guess I need to find a way to attempt reading the 8"
floppy again. Unfortunately, I've given away all of my 8" drives. :-(