I've had a series 2 Tivo for years now. Shortly after I bought it, I realized it was just way too loud. So I replaced the stock hard drive with a Samsung 120GB Spinpoint (7200rpm) and the stock fan with an 80mm Panaflo L1A on a 60mm-80mm adapter and a fanmate. It ran like this for years and was much quieter. But we all know "quiet" is never enough, right?
I've been wanting a capacity bump for a while and really wanted to go for a larger single-platter 5400 rpm drive. Tivo's original drive was a 5400 rpm model, so I knew any modern 5400rpm drive would be plenty fast. The HD502HI fit the bill perfectly. Below is the configuration right before this mod.
Notice that there isn't much room to decouple the hard drive.
The drive mounts to a removable tray, but it's all metal-to-metal contact. I could always feel the Tivo vibrating if I put my hand on it. My idea to decouple it was to remove the tray and strap the drive down to the case frame with some sorbothane in between.
Here you can see the sorbothane blocks as well as the rosewill sata-to-ide adapter (older Tivos are PATA only).
Here it is all wrapped up and ready to go.
The verdict? Huge improvement for sure. With my hand on the Tivo I can just barely detect some vibration. I think I may have zipped the zip-ties on too hard, I bet backing them off a bit or replacing them with bungie or stratch magic would lead to almost no vibration transfer. But it's good enough for now. I can only hear seeks (AAM on) if I put my head within 2 feet of the Tivo. I can still hear some noise from my couch when it's very late at night and quiet, but it is much reduced. I really think further decoupling would result in it being inaudible. I'm probably going tackle that soon.