As I said, I used dd. The file is 250GB. Having gotten a backup of the internal drive I figured there was probably little downside to using it some more. Sequentially reading the whole drive seems to have been good for it as its still running without error. I am not really concerned about getting the extra 250GB from the Seagate, I'd just like to to spin when I hook it up to my TiVo. You think there is an hdparm setting that I need to tweek?