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Remote ADP partitions failed after ISCSI connectivity loss

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Applies to

  • ONTAP 9
  • MetroCluster IP
  • A300/FAS8200, A200/FAS2600, A220/FAS2700, or C190
  • ISCSI connectivity disruption between the clusters 
  • Back-end switch maintenance/failure 

Issue

  • Temporary loss of connectivity between clusters can result in remote drives being marked as 'not responding'. Event log would report similar messages: 

[NodeA: intr: ctl.session.stateChanged:notice]: iSCSI CAM target layer's session state is changed to terminated for the initiator iqn.1994-09.org.freebsd:185abf42-1aba-11eb-a6fc-d039ea45ec7d (address: 10.1.2.3). Reason: no ping reply after 5 seconds.
[NodeA: kernel: iscsi.session.stateChanged:notice]: iSCSI session state is changed to Reconnecting for the target iqn.2016-07.com.netapp:f4d3fb1c-1aba-11eb-a87d-d039ea45eac8 (type: dr_partner, address: 10.1.1.4:65200). Reason: no ping reply after 5 seconds.


sysconfig -a shows an output similar to the below:

    slot 0: Virtual iSCSI Host Adapter 0m 
        ...
        10.20: NETAPP   X371_SLNGE960ATE NA52 915.4GB 520B/sect (S/N) (Failed)

The sysconfig -r output is similar: 

Local broken disks

RAID Disk	    Device    	    HA  SHELF BAY CHAN Pool Type  RPM  Used (MB/blks)    Phys (MB/blks)
---------	    ------    	    ------------- ---- ---- ---- ----- --------------    --------------
not responding	0m.i2.1L21P3	    0m    0   21         1   SSD   N/A 63849/130764288   63857/130780672 
...
not responding	0m.i1.3L27	    0m    10  20         1   SSD   N/A 915465/1874872832 915715/1875385008 

Disaster recovery partner broken disks

RAID Disk	Device    	HA  SHELF BAY CHAN Pool Type  RPM  Used (MB/blks)    Phys (MB/blks)
---------	------    	------------- ---- ---- ---- ----- --------------    --------------
partner 	0m.i1.6L33	0m    10  9          0   SSD   N/A 915465/1874872832 915715/1875385008


 

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