E-series storage array reports a controller is removed while it is actually inserted

Applies to

NetApp E-Series

Issue

• The controller is physically present in the slot, and the controller chassis displays an amber light.
• All the lights on the affected controller are turned off including the Seven-segment display.
• There is no serial output from the affected controller.
• The Recovery Guru reports:
  • Controller Removed
  • Drive Tray - Loss of Path Redundancy
  • Battery Missing
  • Volume Not On Preferred Path
  • REMOVED_CONTROLLER
  • DRAWER_DEGRADED
  • NON_PREFERRED_PATH
  • DRAWER_DEGRADED
  • REMOVED_BATTERY
  • WB_CACHING_FORCIBLY_DISABLED
  • NO_REDUNDANCY_TRAY
• The Major Event log shows multiple instances of this pattern:
  • Temperature sensor removed
  • Controller removed
  • Degraded wide port becomes failed
  • Controller wide port has gone to failed state
  • Drive tray path redundancy lost
  • Dedicated mirror channel failed
  • Start-of-day routine begun
  • Start-of-day routine completed