Linux with RocketRAID 2320 – dataserver upgrade

A couple of months ago I decided to upgrade the OS of my dataserver. A server I created several years ago with 8 x 750GB hard disks serving a 4TB RAID-5 set. To handle the RAID-5 set I use a RocketRAID 2320 SATA-II Controller from HighPoint Technologies. Motherboard, CPU, memory and video card were replaced over the years, but the raid controller is still operational.

As OS I run Debian, started originally with Etch (I think) and in the years updated to now finally sid). Every update I had some trouble with the RocketRAID driver. Which I could solve with some tweaks.