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Chapter 1 Troubleshooting Overview 1-23
Write-back cache
is disabled.
Controller Cache Disabled:
Either AC power or UPS is not charged
completely.
Action: 1 - If AC power has failed,
restore system power. 2 - If after a long
time UPS is not charged completely,
check UPS.
Severity = Warning
Cache
Disabled
write-back cache
for ctrl x disabled
Write-back cache
is enabled.
Controller Cache Enabled:
System AC power and UPS are reliable
again. Write-back cache is enabled.
Severity = Notice
Cache
Enabled
write-back cache
for ctlr n enabled
The UPS is
shutting down.
UPS shutdown:
The system is being shut down
because there is no AC power and the
UPS battery is depleted.
Severity = Critical
!UPS: Shutting
down
UPS Failure UPS failure:
Communication with the UPS unit has
failed.
Action: 1. Check the serial cable
connecting the UPS unit to one of the
CPU enclosures, OR
2. Check the UPS unit and replace if
necessary.
Severity = Critical
EnvUpsFail U25 UPS
failure
UPS:
Communication
failure.
TABLE A-3 UPS Error Messages
Event E-Mail Subject: Text SNMP Trap LCD Panel Log