It's hard to say what the problem is unless you do the tests repeatedy on both machines, and you consistently get the same results. Also helps if you read the error logs or something to determine what the failure was due to. Because at the moment, who knows whether the issue is with your hard drive, or with seagate seatools, or with that other computer.
And if you do happen to get consistent results on that 'other' machine, then see what happens if you try a different version of seatools - ie try a few different versions of seatools for DOS, and see what happens. If other versions of seatools gives 'pass' results on that 'other' machine, while you consistently get 'issues' with the version of seatools that you initially used, then it would simply point to a compatibility issue.
