Yes, having gained a little more experience of ddrecue, I now think that was the case.

Booted from the Remix live CD which includes ddrescue.

I have since run it again and tried to change the '-f' option, but it wasn't having that as there was data already on the target.

Here is the returned result:

Initial Status (read from logfile)
rescued 0B, generated 0B,
Current Status
rescued: 264104MB, generated 1TB current rate:96206KB/s
Oppos: 1TB, average rate: 107MB/s
Finished
My intention now is to become more familiar with the Remix console and ddrescue. In particular to explore the path system for storing the log file in an umounted drive. I expect it just becomes part of the output file and is then written to the target as a whole. Also, I will re-examine the remaining options-perhaps I missed something obvious.
I do appreciate your help.
Regards Roy

---------- Post updated at 17:18 ---------- Previous update was at 08:36 ----------

I have come to the conclusion that ddrescue, or the Remix version if such, is incapable of writing an output to anything other than a completely fresh i.e. empty disk. Having put considerable effort and time into this. The -f option will not overwrite the data onto a healthy diskcontaining dataeven after a satisfactory completion.
I hope that it makes a better job of what is stated as it's primary purpose, but for simple disk cloning it is a no - no.

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