@loic.lopez Hello again. Yes Rockstor is not suitable for a dual boot arrangement. It is very much orientated towards being the only operating system on the computer (virtual or real) that it is installed on. Also note that it is also very much advised to have a single device for the system disk, not a partition or part of a disk used for anything else. It is more an appliance type of linux distribution, as apposed to a general desktop type linux distro which are what dual booting scenarios are normally associated with.
Your only other option is to install it in something like virtual box where it will have it’s own (be it virtual) machine all to itself.
@loic.lopez This would be possible but highly inadvisable and technically difficult to maintain (unless only one was attached at a time that is). And you are almost certain to have major headaches and conflicts and potentially data loss as a result of mixing these systems. And you would be constrained to using only bios boot switching and system updates on either side could change / break / confused the other side.
I would strongly advise against this and don’t think you are likely to get much help on the forum going forward with such a compromised solution. So that might be a thing.
Hope that helps.
But it may be informative to know that Rockstor can work on pretty low end hardware. See the Minimum system requirements section in our docs. Plus it’s a lot more fun to experiment with a system that can’t inadvertently wipe out one of your other systems.