Bitcoin

After updating Umbrel, my Bitcoin Node disappeared from the dashboard and I couldn’t reinstall it from the App Store. Here’s how I fixed it. The Problem After updating Umbrel and restarting the VM: Bitcoin Node disappeared from the Umbrel dashboard App Store showed Bitcoin Node as available for installation (like it was never installed) All my blockchain data seemed gone Root Cause The Umbrel update overwrote /etc/fstab, which contained the mount configuration for my external drive. Without this entry: ...

Running a Bitcoin Full Node requires over ≈800GB of storage. This guide shows you how to keep Umbrel fast on an internal drive while storing blockchain data on an external drive. Requirements Homeserver with Proxmox and Umbrel VM installed External USB drive (2TB SSD recommended) Used in this tutorial: 🛒 Kingston XS2000 2TB Cheaper alternative: 🛒 Kingston XS1000 2TB Proxmox Setup For these steps, I followed the video by @absprog on YouTube. ...

Bitaxe Gamma: The open source Bitcoin miner for your home Bitcoin mining doesn’t have to be complicated or expensive. With the Bitaxe Gamma, also known as the “Lucky Miner,” you can dive directly into the world of mining from home – with a device that is not only powerful but also completely open source. When solo mining with the Bitaxe Gamma, you participate in a kind of “Lucky Lottery”: Your chance of finding a Bitcoin block and collecting the full reward of 3.125 BTC (€240,625 at €77,000/BTC as of March 2025) is small but real. In this article, I’ll introduce you to the Bitaxe Gamma, explain its features, and show how you can optimize it with simple upgrades. ...

AxeCalibur: Off-Grid Bitcoin Mining with Solar Energy Is it possible to run Bitcoin mining around the clock using solar energy? The AxeBox from 100 Acres Ranch has proven it works. In this article, I’ll introduce this DIY solution, explain why replicating it – dubbed the “AxeCalibur” – might be worthwhile, and provide a parts list for building it yourself in Europe. AxeCalibur – The Miner That Can’t Be Unplugged: Solar-Powered, Battery-Driven, 24/7 Unstoppable. ...

Buying Bitcoin or Buying a Miner – Which Is More Worthwhile? Bitcoin (BTC) remains a hot topic in 2025. But what pays off more: buying BTC directly or investing in a Bitcoin miner like the Bitaxe Gamma? On March 21, 2025 – Plebday – I’m launching an experiment: I’ll invest €130 in Bitcoin and €130 in a Bitaxe Gamma. This article compares both approaches, and I’ll update it regularly. As something came up in my private life, I postponed the experiment by roughly a week and am starting it at the same time as Mining Disrupt, a conference on the topic of Bitcoin. ...