# Uberblok

> An interactive museum of ZFS internals based on OpenZFS source code

- Website: https://uberblok.storagebits.workers.dev
- Category: Other
- Launched on RankRoot: 2026-10-21
- Visitors sent by RankRoot: 0
- Show HN discussion: https://news.ycombinator.com/item?id=50180257

## About

Uberblok is an interactive museum that demonstrates ZFS file system internals through visualizations and animations. Every animation and code excerpt maps directly to lines of OpenZFS zfs-2.4.4 at commit 71a9f9578616. The museum covers storage pool architecture, the uberblock, vdev configurations, and the historical timeline of ZFS development from Sun Microsystems to OpenZFS.

## Who it's for

Software engineers, system administrators, and storage architects interested in ZFS internals and file system design.

## Use cases

- Exploring ZFS storage pool structures and the uberblock mechanism visually
- Studying OpenZFS source code implementations through interactive room animations
- Reviewing the historical milestones and development timeline of ZFS from 2001 to 2026

## Features

- Interactive 3D view of the uberblock ring across varying disk sector sizes
- Excerpts and line-by-line links to OpenZFS zfs-2.4.4 source code
- Room-by-room breakdown of ZFS data structures, tree changes, and vdev allocations
- History wing documenting dated milestones with sourced facts and quotes

## FAQ

### What does Uberblok do?

Uberblok is an interactive museum that displays ZFS internals, data structures, and source code animations room by room.

### Who is Uberblok for?

Uberblok is for developers, storage engineers, and system administrators who want to understand how ZFS works under the hood.

### What version of ZFS does Uberblok map to?

Every animation and code excerpt in Uberblok maps to lines of OpenZFS zfs-2.4.4, frozen at commit 71a9f9578616.

### What is an uberblock in ZFS?

The uberblock is a small record that names the root of everything in a ZFS pool, holding a transaction group number and a block pointer to the MOS tree.


Source: https://getrankroot.com/launches/uberblok. Product facts come from the maker or the product's own website.