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    • https://kb.netapp.com/on-prem/E-Series/Hardware-KBs/After_cache_backup_device_failed_replacement_EF600_not_booting
      Applies to EF600 Issue EF600 controller was replaced due to failed persistent cache backup device. During replacement, EF600 controller does not boot up as there is no serial output even though LEDs a...Applies to EF600 Issue EF600 controller was replaced due to failed persistent cache backup device. During replacement, EF600 controller does not boot up as there is no serial output even though LEDs are on.