[CentOS] how to update from 5.8 to 5.latest?

Mon Aug 15 10:36:42 UTC 2016
Kai Schaetzl <maillists at conactive.com>


I revived an old disk with CentoS 5.8 on it and want to update it to 
5.latest (=5.11). However, it insists on getting 5.8 files. From the past 
I remember I would get a major release jump from 5.n to 5.m automatically. 
Or do I remember this wrong?
I googled a bit around, but couldn't really find something similar.

How do I update now? The repo file looks exactly like on machines that are 
up to 5.11. Should I change it manually to 5.11 or just 5 paths?
Does it still understand that this is then an upgrade to a another major 

Or should I do something different to make it upgrade to 5.11?