Block device upfuckery layers are powerful against databases. Years ago some colleagues wrote one that provides most of the hazards described by "Parity Lost and Parity Regained"[1] to test FoundationDB, which immediately uncovered several flaws in a project that described itself as well-tested. It's easy to do this with all the probing features that Linux (and others) provide today.

1: https://www.usenix.org/legacy/event/fast08/tech/full_papers/...

I'm definitely going to use the word "upfuckery" instead of fault injection the next time I need it.