Recovering data from a Synology RAID 1 disk

dsI decided to test whether I was able to recover data from one of the two RAID 1-configured disks installed in my Synology DS211j.

This article from Synology forum seems to provide some valuable information. Let's try it. On my PC running Linux Mint 17, I just have to install mdadm, lvm being already installed. Then I try the command described in the forum thread:

sudo mdadm --assemble --scan

And that's it: the disk is mounted and I can read files!

ESP8266 - Set up

ESP-01Almost one year ago, I discovered the ESP8266. That's a programmable Wi-Fi chip now quite well-known by a growing, very active community. Several boards based on it are available, at prices as low as $6 or $7.

Some web resources for IoT and M2M

Today, someone on LinkedIn asked me which resources I was using to keep up with technologies, industry and market. In my answer, I listed following web sites:

http://m2mworldnews.com/
http://www.sensorsmag.com/networking-communications/wireless-news
http://linuxgizmos.com/
http://postscapes.com/
http://iot.freescale.com/
http://embedded-computing.com/
http://www.edn-europe.com/

Gitlab in a Docker container

logoA little bit more than one year ago, I started playing with Docker. I now run almost all server applications I use in containers: two Drupal web servers, a phpBB forum, a reverse proxy, a DNS server, a MineOS server for my son, etc. I have had the opportunity to investigate how to handle various requirements: data persistence, application update, microservice architecture, service dependency, etc. But I still consider myself as a naive beginner: the applications I have dockerized are for my personal use only. Consequently I've never been exposed to real-life constraints (large number of connections, security, high availability, etc.)

From time to time, I'm asked by some friends to help them, in my field of expertise[1], to solve some issues they face or to rapidly develop proofs of concept. Deliverables are source code and possibly some electronic schematics. Until recently, I have used email and file transfer to deliver those elements. And I have used a private version control system. Some weeks ago, I decided to spend some time in checking whether a dockerized GitLab could be a good solution to replace my archaic way of handling and sharing source code and schematics.

After some tests, I got the answer: yes! This article describes the few steps I followed to set up my configuration.

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