[Info-vax] Unpleasant Disk Shadowing Surprise

[JF Mezei]

A normal altitudes, ozone levels can be higher in a house than outdoors.
Laser printers and electronic air filters tend to create ozone.

If your equipment is aboard an aircraft flying at high altitude, then
the story is different.  Passenger aircraft are supposed to have ozone
filters and they are not single pass HVAC except for very old aircraft.

Are you in a military boeing 707 (forget the military designation for
same aircrtaft) ?