NEC Express5800 User Manual page 300

8-22 Troubleshooting
On-screen message
Single-bit overflow ECC errors were
detected during the previous boot of the
controller. DIMM on the controller needs
replacement.
If you continue, data corruption can occur.
Press 'X' to continue or else power off the
system and replace the DIMM module and
reboot. If you have replaced the DIMM
please press 'X' to continue.
Action
Contact your service representative to replace the
RAID controller.