If my OMV system failed or OMV hdd disk broken.I will reinstall a new OMV to new hard disk.
But the new OMV could mount exist RAID hard disk?
How to do it?
After a fresh install my RAID1 was detected automatically.
I think this is the standard behaviour. But does not work always. In those cases some action from CLI is needed.
In any case: make sure to have a solid backup strategy.