I bought the 400GB 8MB Cache Seagate hard drive that was on sale at Outpost for $99 back in May. I've been very happy with it up until the last few days. My Tivo has developed a loud hum. I can place my hand on top of the Tivo and the noise will stop so I'm certain that vibration from the hard drive is causing the Tivo's case to make the noise. I can set something on the case and stop the noise so I'm not really worried about the noise but I am wondering if the vibration could eventually cause damage to my Tivo? Is this vibration normal or should I RMA the hard drive? Thanks!