Just a FYI: It IS NOT a low level format. You CANNOT low level format a modern HD. This is a zero fill format. Major difference between the two. A low level format is something that had to be done on very very antique styled HD's that could physically get out of kilter. Low-level formatting is the process of outlining the positions of the tracks and sectors on the hard disk, and writing the control structures that define where the tracks and sectors are..... not just writing zeros to the drive. A low level format is impossible and if possible totally unnecessary on todays modern drives by the consumer.
Lot's of people incorrectly refer to it as a low level format but they are quite incorrect. For some informative reading go to:
http://www.pcguide.com/ref/hdd/geom/formatLow-c.html
Bottom line tho is that you now understand and should be able to do a zero fill with the Seagate utility. If not post and I will suggest other utilities.