I actually believe that this is the solution I am looking for 😀
The controller with the four drives and room for three extra should be sufficient for a long time, and by using the other controller for JBOD seems like the way to do it.
The raid has allready the latest firmware, so that part shouldn’t be a problem either.
I am not by the raid right now, but is configuring the controller to use JBOD just at setting in raid admin?
Thanks!
Peter