Takeover Disabled Due to Unsynchronized NVRAM Log

• ONTAP 9
• AFF/ASA/FAS
• HA pairs with T6 interconnect adapters

• Storage failover status shows “Takeover not possible: NVRAM log not synchronized” on one or both nodes:
  • Example:
  • Cluster::*> storage failover show
                              Takeover
Node           Partner        Possible State Description
-------------- -------------- -------- -------------------------------------
Node-n1   Node-n2   false    Connected to Node-n2, Takeover is not possible: NVRAM log not synchronized
Node-n2   Node-n1   -        Up. Node accessible via HA-IC, but cluster access failed

Fri Jul 10 21:23:20 +0000 [Node-n2: cf_main: cf.fsm.takeoverByPartnerDisabled:error]: Failover monitor: takeover of Node-n2 by Node-n1 disabled (unsynchronized log).
Fri Jul 10 21:23:24 +0000 [Node-n2: cf_main: cf.fsm.takeoverOfPartnerDisabled:error]: Failover monitor: takeover of Node-n1 disabled (unsynchronized log).
Fri Jul 10 21:23:20 +0000 [Node-n1: cf_main: cf.fsm.takeoverOfPartnerDisabled:error]: Failover monitor: takeover of Node-n2 disabled (unsynchronized log).
Fri Jul 10 21:23:24 +0000 [Node-n1: cf_main: cf.fsm.takeoverByPartnerDisabled:error]: Failover monitor: takeover of Node-n1 by Node-n2 disabled (unsynchronized log).

• HA ports are up and healthy:
  • Link Status         Node-n1  Node-n2
Link 0 Status       up            up
Link 1 Status       up            up
IC RDMA Connection  up            up
Is Link 0 Active  true          true
Is Link 1 Active  true          true
• In SP console logs we see that the T6 adapter is not responding:
  • destroy_cq - Device t6nex1 not responding after 300.019928 seconds - tid 0 qpid 0
destroy_cq - Device t6nex1 not responding after 1260.040696 seconds - tid 0 qpid 0
destroy_cq - Device t6nex1 not responding after 5100.061536 seconds - tid 0 qpid 0
destroy_cq - Device t6nex1 not responding after 20460.080536 seconds - tid 0 qpid 0