All of those hardware based (no drivers required) RAIDs should work but you would be a pioneer with that particular one. Note that that is not a particularly attractive price (similar items are ~$60) and I get a sense it has a really loud fan. The kind of drives you are most likely to put in it the (WD GreenPower series) are not particularly hot. Since it has a fan switch it should be easy to add a fan speed controller to adjust the noise appropriately for the cooling needed (you always wanted an excuse to get a passive infrared thermometer, right?) If you have a TiVo HD the connection is trivial because the eSATA port on the TiVo can be easily rerouted to the internal drive's SATA port on the mainboard. The RAID 1 then appears as the internal drive to the TiVO. If you have a TiVo S3 ping me and I will point you to an old thread that shows how to do the connection.