https://www.theregister.co.uk/2019/04/12/heliumfilled_disk_drives_stored_black_hole_data/

among other
The low ambient air density at the telescope sites necessitated sealed, helium-filled hard drives, both for the system disk for recorders and also in all the data recording modules. Ordinary air-filled drives crashed when tried out in 2015; the air was too thin to provide the cushion needed to support the heads.


and how it stacks up to going to the moon ;-)
https://twitter.com/BBCEarth/status/1116280359887486977?ref_src=twsrc%5Etfw