I have an external 1.5tb sata drive in a usb/sata enclosure. It worked flawlessly everywhere and on all my pcs except, until recently, on an old dell laptop with windows 7. I've uninstalled & reinstalled the usb drivers on this dell laptop and still it doesn't recognize the 2nd partition, though it used to without a problem for several weeks. Its not the drive because I plug it in elsewhere and can see both partitions w/o a problem. Any suggestions?