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Lost connectivity error message during switchover
https://kb.netapp.com/data-mgmt/OTV/VSC_Kbs/Lost_connectivity_error_message_during_switchover
Applies to ONTAP 9 VMware vSphere Issue Switchover fails with the error: Lost connectivity to storage device <device NAA identifier>. Path <HBA> is down. Affected datastores: <datastore>.

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