Nate Duehr wrote: > Watching downlink video, even I can see that laptop computers are flown > regularly as part of standard hardware. What *are* you talking about? I have seen that, and I wondered about the hard drives. At low absolute pressure, the disks would crash. I don't know what the functional lower limit is for barometric pressure to maintain operation, but I would suspect it is at least a few PSI. Consequently, maybe they use sealed hard drives on those computers, just in case? Or perhaps they have more important things to worry about if they have to depressurize. -- Mike Poulton mpoulton@mtptech.com MTP Technologies KC0LLX -- http://www.piclist.com hint: The PICList is archived three different ways. See http://www.piclist.com/#archives for details.