At the moment no. The serial number is NOT on the hard disk. In fact unlike a TiVo there is almost NOTHING on a Fetch hard disk apart from a signature file to let the box know it is prepped for use on a Fetch box. Everything else is stored on the motherboard and at present very locked down.

For now given they are not very big in physical size I suggest hanging onto them. Another side hobby I have (but VERY limited time) is to provide support for Fetch boxes.

Cheers