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EonStor A16E-G2130-4 Installation and Hardware Reference Manual  

The following messages may appear on the LCD screen: 

Message 1: “UPS connection is absent” 

This message appears when COM2 has not been connected to the UPS. 

Message 2: “UPS connection detected” 

This message appears when the COM2 ports on the subsystem have been 

connected to the UPS. 

Message 3: “Warning: UPS AC Power-Loss detected” 

This message appears when the UPS battery power level remains above 

50% but its connection to the AC power supply has been disrupted in some 

way. The write policy changes from write back to write through. 

Message 4: “Warning: UPS Battery Low 50%. Please shut down to protect 

data loss” 

This message appears when the UPS battery power level has dipped below 

50% of its capacity and the UPS has either been disconnected from the AC 

power supply or the AC power supply has been disrupted. The write policy 

will be changed from the default write back to write through. If this message 

appears, the subsystem should be properly shut down to avoid data loss. 

Message 5: “Warning: UPS Battery Low 50%” 

This message appears when the UPS battery power level has dipped below 

50% of its capacity. The default write policy will be changed from the 

default write back to write through. 

Message 6: “UPS Battery restored to safe level” 

This message appears when the UPS battery power level has been restored 

to above 50% of its capacity. The write policy will be changed from write 

through to write back. 

Message 7: “UPS AC Power Restored” 

This message appears when the AC power supply to the UPS has been 

reconnected. If the UPS battery power level is below 50%, the write policy 

will remain as write through. If the battery power level is above 50%, the 

write policy will change from write through to write back. 

D-4  

UPS Status Monitoring