That Info code means the unit is scanning the raid array for any errors, and checking the data to make sure it is correctly mirrored on both drives.
The unit will be slow during this time, as it is essentially doing two things at once.
Once the unit is finished with its scan, it should report an error code (if one was encountered) or return to operating normally.
If you see an error code on the unit, I advise contacting Technical Support for further assistance.