Note that it's possible to (mostly) hermetically-seal non-helium, air-exchanging...

banish-m4 on July 10, 2024 | parent | context | favorite | on: The Race to Seal Helium HDDs (2021)

Note that it's possible to (mostly) hermetically-seal non-helium, air-exchanging breather holes of HDDs for use in submerged mineral oil applications. It's typically done by adhering a flexible membrane over the air port.