52
Troubleshooting
Is the power supply Input Power Source LED off?
Is the Voltage/Fan Fault/Service Required LED amber?
For additional information, contact
support.lenovo.com
, select
Product Support
, and navigate to
Storage
Products
.
Controller failure in a single-controller configuration
Cache memory is flushed to CompactFlash in the case of a controller failure or power loss. During the write
to CompactFlash process, only the components needed to write the cache to the CompactFlash are
powered by the supercapacitor. This process typically takes 60 seconds per 1 Gbyte of cache. After the
cache is copied to CompactFlash, the remaining power left in the supercapacitor is used to refresh the
cache memory. While the cache is being maintained by the supercapacitor, the Cache Status LED flashes
at a rate of 1/10 second on and 9/10 second off.
If the controller has failed or does not start, is the Cache Status LED on/blinking?
Answer
Possible reasons
Actions
No
System functioning properly.
No action required.
Yes
The power supply is not receiving
adequate power.
•
Verify that the power cord is properly connected, and check
the power source to which it connects.
•
Check that the power supply CRU is firmly locked into
position.
•
Check the event log for specific information regarding the
fault.
•
If the above action does not resolve the fault, isolate the
fault, and contact Lenovo for assistance.
Table 15
Diagnostics LED status: Rear panel power supply “Input Power Source”
Answer
Possible reasons
Actions
No
System functioning properly.
No action required.
Yes
The power supply unit or a fan is
operating at an unacceptable
voltage/RPM level, or has failed.
When isolating faults in the power supply, remember that the
fans in both modules receive power through a common bus on
the midplane, so if a power supply unit fails, the fans continue
to operate normally.
•
Verify that the power supply CRU is firmly locked into
position.
•
Verify that the power cable is connected to a power source.
•
Verify that the power cable is connected to the enclosure’s
power supply unit.
Table 16
Diagnostics LED status: Rear panel power supply “Voltage/Fan Fault/Service Required”
Answer
Actions
No, the Cache LED status is off, and the
controller does not boot.
If the problem persists, replace the controller module.
No, the Cache Status LED is off, and the
controller boots.
The system has flushed data to disks. If the problem persists,
replace the controller module.
Yes, at a strobe 1:10 rate - 1 Hz, and the
controller does not boot.
You may need to replace the controller module.
Yes, at a strobe 1:10 rate - 1 Hz, and the
controller boots.
The system is flushing data to CompactFlash. If the problem
persists, replace the controller module.
