Msg#: 4165468 posted 12:16 am on Jul 7, 2010 (gmt 0)
there was a gpt protective partition which was stopping it being picked up.
I found the solution:
Type in “DiskPart” in command line. Type in “list disk” in command line to show all disks in this machine. Use “select” to set the focus to the specified partition, for example “select disk 1″. Use “clean” command to remove GPT disk from the current in-focus disk by zeroing sectors.
There was nothing critical on the drive for myself so a reformat looked like the easiest way.