You have heard of the myth about water behaving differently from the northern hemisphere compared to the southern hemisphere. Especially when draining water out of a sink or bath. Well apparently this is a myth and not fact.
So what has this got to do with hard drives? Well the same was said about some of the old Maxtor hard drives and why they were built with clockwise disc rotation. Where they built for the southern hemisphere market and do they work as well in the northern hemisphere. Built in mid 2000 the Maxtor DiamondMax 10 hard drives were designed to spin in the opposite direction to the conventional mechanical hard drives.
I could not find any information as to why they were built this way and whether this design did improve performance depending on location in the world. Maybe this question will never be answered.
See pictures below of a the internal working of a conventional hard drive compared to the Maxtor DiamondMax 10 hard drives.