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Yes, tried using battery power only to no avail. I do know it's an AC hum along with some noise. The sound/note is a "B" . . . . typical AC hum note (60 cycle). Will keep trying. Also, don't want to move hardrive around too much. Makes grinding sound! I'll leave it alone. Don't want to make one of the drummers inside . . . . mad at me!! Ha!




If your hard drive makes a grinding noise, it's not time to ignore it. You need to replace it before something bad happens. You're gonna end up needing one soon from the sounds of it.

I don't think any hum on battery power is gonna be AC Hum. It's running on DC with the battery. Something else going on if it happens on battery power.


I do not work here, but the benefits are still awesome
Make your sound your own!