I've noticed the V6 boxes are louder than their predecessors - I think it's the hard drive whirring when the boxes come out of sleep? I can only hear it when it's very quiet though. It's difficult to describe online obviously, but how "loud" is "loud"?
I dont hear mine at all- and I can hear my computers HD spinning from across the room so was pretty surprised NOT to hear anything off V6
In fairness its in a VERY sturdy (solid oak) AV unit, so maybe thats damping it. Never heard me vanilla TiVo either in the same unit but can hear the other one on a metal/glass unit I have in another room.
As a Very Insightful Person, I'm here to share my knowledge. I don't work for Virgin Media.