Falcon 24 Dual Fibre Installation and Hardware Reference Manual
B.6.1 Normal Operational Status
If the UPS is connected to main power and the UPS battery power level is above
50%, then no status messages will appear and the “Write-back” write policy will be
applicable.
B.6.2 UPS Messages
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 or an
established link is lost.
Message 2:
“
UPS connection detected
”
This message appears when the COM2 port link to a UPS has just been established.
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 source has been disrupted.
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
charge capacity and the UPS has either been disconnected from the AC power source
or the AC power source has been disrupted. If the event triggered configuration has
been enabled, arrays using write-back caching will be forced to adopt the write-
through mode. When the UPS battery is restored to its full charge, the original array
operating mode will be restored.
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 original array write policy will be restored.
Message 7:
“
UPS AC Power Restored
”
This message appears when AC power to the UPS has been restored. 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.
B
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UPS Status Monitoring