Leds: Rear Panel "Cache Status - Lenovo ThinkSystem DS Series Hardware Installation And Maintenance Manual

is being maintained by the supercapacitor, the Cache Status LED blinks 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
No, the Cache LED status is off, and the
controller does not boot.
No, the Cache Status LED is off, and the
controller boots.
Yes, at a strobe 1:10 rate - 1 Hz, and the
controller does not boot.
Yes, at a strobe 1:10 rate - 1 Hz, and the
controller boots.
Yes, at a blink 1:1 rate - 2 Hz, and the
controller does not boot.
Yes, at a blink 1:1 rate - 1 Hz, and the
controller boots.
Table 7 LEDs: Rear panel "Cache Status"
Action
If the problem persists, replace the controller module.
The system has flushed data to disks. If the problem persists,
replace the controller module.
You may need to replace the controller module.
The system is flushing data to CompactFlash. If the problem
persists, replace the controller module.
You may need to replace the controller module.
The system is in self-refresh mode. If the problem persists,
replace the controller module.
Controller and expansion modules 51