NEC Express5800/R320a-E4 User Manual page 406

7-40 Troubleshooting
DataViewer is not displayed normally when the PCI module (IO module) is running in
the simplex mode.
→ When only the PCI modules (IO modules) is running in the simplex mode
(non-duplexed mode), the DataViewer cannot display the status of the SCSI
enclosure and mirror disk. To check if the duplex mode is changed to the simplex
mode, check the event log or alert viewer log, or the status color of the PCI module
by the DataViewer.