A: If there is HDD error, there will be red led for the red marked part LED. [[File:Hdd.png|thumb|none|HDD error]]
Q8Q9: RAID issue with OMV.
A: The RAID mode is not tested with OMV OS. The OMV also supports software RAID, you can set the X882 to PM mode and test the software RAID of OMV.