Quote Originally Posted by GailH View Post
NooNoo: I've installed a SATA disk with the purpose of periodic backup only (like, once every couple of days). I'd like it to stay asleep in between. My understanding is that revoSleep is the only utility around which can do it. Can offer other suggestions?
Use an external drive and physically disconnect it from the computer and power. If you have a power supply failure/lightning strike/power surge that takes away your drives you'll end up without both your data and the backup... Yes, I've seen quite a few such failures in my life...