Thanks again Richard and SD.
Would appreciate your further help with the following ...
Knoppix can access the problem drive and open all the files etc. I can bring up two windows, the problem and the secondary IDE. However, when I try to copy the drive contents I get a message to say I don't have permission. The help file says that one must log in as Root or Superuser to allow this. Trouble is I don't know and can't find the password for either. Any clues, please?
By the way, my other idea of copying to CD/DVD is a bit impracticable because of the file totals involved.