First screen, captured 4 days ago.

Show HN: Uberblok – an interactive museum of ZFS internals

Uberblok is an interactive web museum explaining OpenZFS internals like the uberblock, copy-on-write, txgs, RAID-Z and the ARC with animations tied to source code.

What HN thinks

A loving tribute to ZFS, slightly upstaged by the question of who actually wrote the placards.

AI-written prose undermines it
Several commenters found the text obviously LLM-generated and grating, and questioned how far an author who 'directed' agents can be trusted as an educator.
ZFS is a beloved filesystem
Users praise ZFS for easy pools, snapshots, send/recv and reliability, and use it across FreeBSD, Linux and macOS, with some wistfulness about Apple's abandoned ZFS plans.
Why ZFS isn't everywhere
Commenters mostly blame the CDDL/GPL incompatibility, along with RAM use, perceived complexity and ext4 being good enough. ARC bypassing the page cache and shaky native encryption were raised as real drawbacks.

Consensus: Most agree ZFS is excellent and that licensing is the main barrier to Linux adoption. Many also agree the exhibit's AI-generated prose needed a human editing pass.

Recommended in the comments

FreeBSD (product): Recommended for running ZFS without ARC fighting the system page cache and without licensing friction.
OpenZFS on OS X (tool): Lets macOS users run ZFS on external disks.

Summarised by Claude from the comment thread 3 days ago.

Points: 107
Comments: 28
Best rank: #11
Posted: 2026-10-21 by storagebits
Category: Devops infra

zfs openzfs file-systems storage copy-on-write raid-z interactive-visualization

All captures:

Full page

Captured 4 days ago. Click for the whole screenshot.

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