> Personally I love OS tech so maybe I'm just cut out for it. I used to be able to tell what the machine was doing from the HDD whirrs (...) I loved the story

> Personally I love OS tech so maybe I'm just cut out for it. I used to be able to tell what the machine was doing from the HDD whirrs (...) I loved the story about how a developer of ZFS, from the Sun days, went down a rabbit hole of optimizing the filesystem because he didn't like the sound hard drives made on certain write loads. Turns out he was right, there was funky stuff going on with the I/O scheduler. Too long ago, I don't remember the source, sorry.