NOTE: Remove the CompactFlash memory card only if recommended by Dell EMC technical support.
Transportable cache only applies to single-controller congurations. In dual-controller congurations featuring one healthy partner
controller, there is no need to transport failed controller cache to a replacement controller because the cache is duplicated between
the controllers, provided that the volume cache is set to standard on all volumes in the pool owned by the failed controller.
Cache Status LED – corrective action
If the controller has failed or does not start, is the Cache Status LED on/blinking?
Table 10. LEDs: Rear panel Cache Status
Answer Action
No, the Cache LED status is o, and the controller does not boot. If the problem persists, replace the controller module.
No, the Cache Status LED is o, and the controller boots. The system has ushed 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 ushing data to CompactFlash. If the problem
persists, replace the controller module.
Yes, at a blink 1:1 rate - 2 Hz, and the controller does not boot. You may need to replace the controller module.
Yes, at a blink 1:1 rate - 1 Hz, and the controller boots. The system is in self-refresh mode. If the problem persists, replace
the controller module.
Transporting cache
To preserve the existing data stored in the CompactFlash, you must transport the CompactFlash from the failed controller to a replacement
controller. Failure transport the CompactFlash will result in loss of data stored in the cache module. For the location of the CompactFlash,
see Transporting CompactFlash.
CAUTION
: Remove the controller module only after the copy process has completed, which is indicated by the Cache Status
LED being o, or blinking on 1:10 rate.
32 Storage system hardware
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