Defraggler 2.07 seems to have a problem with showing rotation rate for harddisk drives. At least, on my Desktop & a few other desktop computers.
Would love to see this fixed, as it would be very nice to be able to see if someone is running an older 4,200 RPM drive, or a 5,400, or a 7,200, etc, etc.
Have seen 2 or 3 computers where it just listed that the rotation rate is unsupported!
And on this machine, it is a Western Digital 80 GB 7,200 RPM drive.
Have also seen the same error message for someone with a 40 GB Samsung HDD.
Hope this gets fixed!