LUNs Not Visible on Host end after Node Decommission due to missing ISCSI sessions to the SLM reporting nodes

Applies to

Issue

• LUNs presented from the NetApp cluster were not visible on the Windows SQL Server hosts after the removal of two cluster nodes ( Node:1 and 2 for example ) from a 8 node cluster.
• Luns were hosted on Node-1 and 2.
• Prior to the Node decommission, the luns had reporting nodes configured as  Node:1,Node:2, Node:3 and Node:4.
• The Affected IQNs were logged in on NetApp end using paths to Node:1,2,5 and 6 prior to the decommission.

• The concerned IQNs are in logged in status on NetApp CLI as per igroup show -v command output.

Initiators:
iqn.1991-05.com.microsoft:initiator1.mmi.local (logged in)
iqn.1991-05.com.microsoft:initiator2.mmi.local (logged in)

• System Manager shows the IQN status as "none connected".
• EMS log on NetApp end does not report any fcp errors during the issue time.
• Luns are online on NetApp end.

Cluster::> lun show /vol/XXXX*/*
Vserver      Path                     State   Mapped   Type      Size
--------------------------------------------------------------------------------------
van-svm1     /vol/LUN1/LUN            online  mapped   windows   502.0MB
van-svm1     /vol/LUN2/LUN            online  mapped   windows   150.0GB
van-svm1     /vol/LUN3/LUN            online  mapped   windows   250GB
van-svm1     /vol/LUN4/LUN            online  mapped   windows   50.01GB
van-svm1     /vol/LUN5/LUN            online  mapped   windows   50.01GB