Back when hard drives were MFM and up to 20 MEGAbytes and then RLL controllers came to make 20MB into 30MB and drives would constantly fail because they didn't

Back when hard drives were MFM and up to 20 MEGAbytes and then RLL controllers came to make 20MB into 30MB and drives would constantly fail because they didn't even auto-park the heads on powerdown, SpinRite saved my butt many times. I bought it up to version 5 if I vaguely remember correctly and I think I still have a sealed spare copy around somewhere (used to resell to customers). If SpinRite was "fake" it sure did something for me.