Check the RAID controller's error logs for any hardware or software errors that may have caused the non-operable state. Check the RAID configuration settings to ensure that all settings are correct and that no changes have been made that could cause the RAID to become non-operable. Check the physical hardware components of the RAID for any signs of damage or wear and tear that could be causing the non-operable state. Check the system's power supply and ensure that it is providing adequate power to the RAID. If possible, test the RAID in another system to determine if the non-operable state is caused by hardware or software issues.