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    The disk shows up because it has a "controller" that allows the computer to identify a FireWire/USB device is connected. The "controller" board is a bridge that translates the internal SATA to the different connections you have (FireWire, SATA etc.). Have you tried plugging the disk in to another computer? Have you tried connecting to your Mac via USB instead of the FireWire? If you've exhausted all possibilities then take it back and get them to try to partition the disk (accept a replacement or refund if not). As it's new and not doing what it should then it'll be a warranty call.
    – Kinnectus
    Commented Oct 30, 2014 at 16:26
  • Thanks. When it's connected via USB, it doesn't show up at all in Disk Utility. I will try it on a couple other computers when I get a chance. Replacement may not be an option, since I wasn't the original purchaser.
    – ted.strauss
    Commented Oct 30, 2014 at 17:31
  • It should have done, quite surprising. It may be the controller board. Need to rule it out so try other machines - a mix of USB, FireWire and eSATA.
    – Kinnectus
    Commented Oct 30, 2014 at 18:06