Hi, I just upgraded my Tivo 540040 with a second hard drive last weekend. It went well but the drive I used was old and now it whistling quite a bit. I want to replace that upgraded drive will a new one and was wondering if I have to someone remove the second drive from the mfs mount before installing the new drive. I did do a backup and I guess worst case, I could restore that to the original drive. Any advice would be appreciated.