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DISK REDUNDANCEY FAILED in MetroCluster IP: Quad-Path to Multi-Path Transition

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metrocluster
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MetroCluster
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Applies to

  • MetroCluster IP
  • ONTAP 9
  • MetroCluster IP Switch

Issue

  • A MetroCluster IP  generated a “DISK REDUNDANCEY FAILED” alert on all four nodes.
  • The system storage configuration on each node changed from Quad-Path HA to Multi-Path HA, resulting in loss of disk redundancy and potential risk to disaster recovery operations.
  • Event logs:
Sat Apr 25 02:25:47+0200 [NodeA1:wafl_exempt01:nvmm.mirror.aborting:debug]: mirror of sysid 2, partner_type DR_PARTNER and mirror state NVMM_MIRROR_ONLINE is aborted because of reason NVMM_ERR_MIRROR_POLL_TIMEOUT.
Sat Apr 25 02:25:49+0200 [NodeA1:kernel:iscsi.session.stateChanged:notice]: iSCSI session state is changed to Reconnecting for the target ... Reason: no ping reply after 5 seconds.
Sat Apr 25 02:25:49+0200 [NodeA1:doneq0:scsi.mcc.adt.ioTransportError:error]: mcc_adt[1]-Transport error during execution of command: HA status 0x13: CAM transport status 0x1b: cdb 0x1c.
  • Switch logs
Apr 25 03:29:55 SwitchA1-1 TRAPMGR[trapTask]: traputil.c(841) 21149 %%NOTE LinkDown: 0/53, ReasonCode: 0x40 (Local Fault)
Apr 25 02:47:48 SwitchB1-1 TRAPMGR[trapTask]: traputil.c(841) 24211 %%NOTE LinkDown: 0/53, ReasonCode: 0x80 (Remote Fault)

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