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Unable to access new LUNs after controller replacement

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ontap-9
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san
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Applies to

  • ONTAP 9
  • iSCSI

Issue

  • Unable to access new LUNs via HA-pair after controller replacement
  • For 4-node(or more) cluster, LUNs can be accessed via other nodes
  • Windows Server event log shows:

mpio event 47

An error occurred while the system tried to claim a Multipath I/O (MPIO) path. The location of the failing path is described by the SCSI address (4, 0, 1, 0) (Port, Bus, Target, Lun). To resolve this issue, either reboot the system, or show hidden devices in Device Manager and try uninstalling the specific disk device indicated above, and then rescan for hardware changes.

 

 

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