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Status Not under consideration
Created by Guest
Created on Mar 30, 2023

Session warning status in the event of DS8k CEC failure

When a DS8k experiences a CEC failure, CSM reports errors on LCUs that are associated with that CEC and changes the session status to Severe (giving the impression to the customer that there is a mirroring problem or scenario that would cause issues during recovery), even though the underlying mirroring is working fine. If there was a state change to a warning status that seems appropriate for a case like this. 

Idea priority Low
  • Guest
    Mar 30, 2023
    When DS8000 experiences a CEC failure, the hardware will automatically failover internally so that the other CEC manages the LSSs for the CEC that failed. CSM is notified of this failover and handles it accordingly. The only time CSM should change the session state to severe is if we do NOT think either CEC is managing the LSSs in question. That is we do not think that the failover occurred or the failover didn't occur properly. In that case, CSM doesn't think it can issue commands to those LSSs and shows a severe state.

    If you're seeing the session go severe but believe that the CEC failover has occurred successfully, then this should be examined closer by DS8000 support to determine why ESSNI has not indicated to CSM that the failover occurred.