On: Ask HN: I'd like an OS/FileSystem that Never Delet...

[Someone]

> Does a filesystem that never deletes/overwrites anything exist?

> Obviously once space runs out it would start overwriting the oldest versions.

You can’t have both.

Also, your system wouldn’t prevent data loss on hardware failures.

What you describe is/may be a WORM device (https://en.wikipedia.org/wiki/Write_once_read_many)