I did a true graphical visualisation of ext4 at FOSDEM a few years ago. The video is here, the visualisation starts at about 20 minutes: https://archive.fosde

I did a true graphical visualisation of ext4 at FOSDEM a few years ago. The video is here, the visualisation starts at about 20 minutes: https://archive.fosdem.org/2019/schedule/event/nbdkit/ https://archive.fosdem.org/2019/schedule/event/nbdkit/ Edit: If you're confused about the bit where I talk about the filesystem trims in "blue", well that's because apparently the projector at FOSDEM could not render the light blue colour I was using. I didn't know about this while giving the talk, it looked fine on the laptop screen. There's an accompanying video on my blog which is rendered correctly: https://rwmj.wordpress.com/2018/11/04/nbd-graphical-viewer/ https://rwmj.wordpress.com/2018/11/04/nbd-graphical-viewer/