Gabriel Guillon posts

Archi & Techno

Getting from shell to Puppet

After this (french) article, dealing with managing servers with shell scripts (what we were doing), and this (also french) one, which dealt with tools for automated deployment (what we planed to do), including Puppet, here is the article about Puppet. By doing. With blood, tears, and victories ;) Because yes, going from servers managed by shell scripts to Puppet, when you don't know Puppet, it's not so easy.

Read more
Archi & Techno

How to rescue your data, 3/3

Last time we have seen how to rescue your FAT. In this article we'll see a third, and last, way of losing data. Physically crash a hard disk Hard disk are made of mechanical pieces, so they are subject to ageing. The S.M.A.R.T. technology, shipped in hard disk for years, can monitor a bunch of indicators helping you foresee your hard disk's end of life. Under GNU/Linux, smartd is widely used. As all the indicators, if they are not seen by a human, they are…

Read more
Archi & Techno

How to rescue your data, 2/3

Last time, we have seen how to rescue a partition. Let's go further and make an other mistake... Crash your partition's FAT The FAT (file allocation table) is a map : it tells the OS where all the files of your partition are. Thus, there is one FAT by partition, and the FAT is depending of the filesystem of your partition. It's the same analogy as the partition table : if you loose this map, the cities are still there but you don't know where.…

Read more
Archi & Techno

How to rescue your data, 1/3

I could show you the recipe on how to rescue your data and disks, but as it mainly depends on the way they are erased / crashed, I will show you in which particular case the rescue I expose can be made. Thus, in those 3 articles I'll expose you three different ways of crashing data and disks, and the ways to rescue them. It serves another purpose : to show you how easy it is to lose data and disk. I've tested for you…

Read more