Hey, I didn't think of that! I have a Knoppix disk on hand too

I used that program that I described earlier (it worked once) and was able to find out was I was after... both drives are noisy :x
In the meantime though, I am still looking for something to use in Windows. I don't use my d: drive very often (only for backups) and so it would be nice to turn it off while still being able to use my computer. Heh... at this point even just finding a serial number for this software (hdsleep) would suit me... it certainly appears to be abandonware. I can't find any trace of the author anywhere.
On a side note it's interesting to see a case of the software I want being readily available for Linux but next to impossible to find for Windows. Usually it's the other way around... 8)
Jim