How High can your hard drive go?

Katmandu is about 4,400 ft in elevation, but Everest Base Camp is over 17,000 ft. Apparently hard drives can have problems at higher altitudes, due to low pressure not allowing the drive head to float properly. Devices with solid state storage (e.g.. flash drives) would be fine. A lot of people claim their laptops worked fine at higher altitudes, and up to 14k seems reasonable safe. Most manufacturers rate their devices to 10k feet. When I get deeper into our trek itinerary, I will see what elevations we will be at each day leading up to base camp. I will just use the net book up to the 10k elevation level to be safe. Here is the little guy we are looking out for, the Seagate Momentus 5400.6 3gb/s 160-gb Hard Drive.