![Death of a hard disk](https://rolfebozier.com/wp-content/uploads/2016/04/IMG_5769-150x150.jpg)
Death of a hard disk
At home, I store data I care about on a network-attached disk array (a Netgear ReadyNAS Ultra 6). It is populated with 6 hard disks, with of 2 of these providing RAID-based redundancy. Recently, one of the disks in the…
![How magnetic core memory works](https://rolfebozier.com/wp-content/uploads/2015/08/320px-Manoderecha.svg_-150x150.png)
How magnetic core memory works
Looking back at computing history in interesting. Firstly, the concepts and hardware implementations are usually simpler and easier to understand – I bought my first computer in the early 1980s and I pretty much understood the whole thing down to…
![Building a simple RF-based sensor network](https://rolfebozier.com/wp-content/uploads/2015/01/rfsensor-sample1-150x150.png)
Building a simple RF-based sensor network
Background I wanted to build a simple wireless sensor network where I could deploy small environment sensors around the house. The sensors needs to be cheap and low-power (so they could run off a small battery for at least a…