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    • iSCSI adapter missing on vCenter / ESXi Host
      https://kb.netapp.com/Legacy/NetApp_HCI/OS/iSCSI_adapter_missing_on_vcenter___Host_ESXi
      Applies to NetApp HCI ESXi vCenter Issue The iSCSI adapter is missing on the ESXi host Below error could appear in vCenter
    • Latency induced by CPU N-Blade/Network on SAN datastores
      https://kb.netapp.com/on-prem/ontap/Perf/Perf-KBs/Latency_induced_by_CPU_N_Blade_Network_on_ISCSI_datastores
      Applies to ONTAP 9 ISCSI Protocol FC Protocol Issue Concern of potential impact caused by latency induced from CPU N-blade or network layer on SAN volumes.
    • ESXi FCoE hosts cannot access volumes however paths are visible
      https://kb.netapp.com/on-prem/ontap/OHW/OHW-KBs/ESXi_FCoE_hosts_cannot_access_volumes_however_paths_are_visible
      FCoE VMware ESXi LUN paths visible but vCenter ESXi in different location cannot access the datastore using Fibre Channel over Ethernet (FCoE) Output of command esxcli storage core device list Status ...FCoE VMware ESXi LUN paths visible but vCenter ESXi in different location cannot access the datastore using Fibre Channel over Ethernet (FCoE) Output of command esxcli storage core device list Status : degraded ( means single path ) Note: "unknown" means ESXi does not recognize the state of the device or "off" may indicate Permanent Device Loss (PDL) Output of vmkwarning.log while trying to access LUN cpu12:123)WARNING: Partition: 123: Partition table read from device naa.xyz failed: I/O error
    • Host MPIO errors and controller redundancy lost CRITICAL 7-segment 05 01
      https://kb.netapp.com/on-prem/E-Series/SANtricity-OS-KBs/Host_MPIO_errors_and_controller_redundancy_lost_CRITICAL_7-segment_05_01
      Applies to E2700 08.40.00.03 Issue Only one iSCSI sessions are reported per windows host Host connection errors Controller in lockdown code OS OL not OS 01 Performance impact for hosts Example: A:07.0...Applies to E2700 08.40.00.03 Issue Only one iSCSI sessions are reported per windows host Host connection errors Controller in lockdown code OS OL not OS 01 Performance impact for hosts Example: A:07.06.20 17:52:53 (15:52:53) 7754 9102 Loss of host-side connection redundancy detected - Host computerx <--CRITICAL Failure Entry 2: OFFLINE_CTL-Recovery Failure Type Code: 28
    • LIF is operationally down after unjoin the node
      https://kb.netapp.com/on-prem/ontap/OHW/OHW-KBs/LIF_is_operationally_down_after_unjoin_the_node
      iSCSI LIF is down and unable to bring up after node unjoin/rejoin(node replacement) 2020-08-04T08:19:31.722Z cpu13:2314298)VMW_SATP_ALUA: satp_alua_issueCommandOnPath:735: Path "vmhba64:C11:T1:L6" (DO...iSCSI LIF is down and unable to bring up after node unjoin/rejoin(node replacement) 2020-08-04T08:19:31.722Z cpu13:2314298)VMW_SATP_ALUA: satp_alua_issueCommandOnPath:735: Path "vmhba64:C11:T1:L6" (DOWN) command 0xa3 failed with status Timeout. 2020-08-04T08:19:31.722Z cpu13:2314299)VMW_SATP_ALUA: satp_alua_issueCommandOnPath:735: Path "vmhba64:C11:T1:L7" (DOWN) command 0xa3 failed with status Timeout. H:0x5 D:0x0 P:0x0 Invalid sense data: 0x0 0x0 0x0.
    • ESXi host fails to mount iSCSI datastore
      https://kb.netapp.com/on-prem/ontap/OHW/OHW-KBs/ESXi_host_fails_to_mount_iSCSI_datastore
      Applies to ONTAP 9 iSCSI ESXi Issue iSCSI LUN not being able to be mounted by ESXi hosts Initiator status show (not logged in) on output of igroup show -instance cluster1::> igroup show -instance Vser...Applies to ONTAP 9 iSCSI ESXi Issue iSCSI LUN not being able to be mounted by ESXi hosts Initiator status show (not logged in) on output of igroup show -instance cluster1::> igroup show -instance Vserver Name: svm0 Igroup Name: iscsi_vmware_xxx_igroup Protocol: iSCSI OS Type: vmware Portset Binding Igroup: - Igroup UUID: a84216dc-xxxx-xxxx-xxxx-005056a4fd7d ALUA: true Initiators: iqn.1998-01.com.vmware:xxxx:87015xxxx:65 (not logged in)
    • IOPS only seen on one node due to indirect iscsi traffic
      https://kb.netapp.com/on-prem/ontap/da/SAN/SAN-KBs/IOPS_only_seen_on_one_node_due_to_indirect_iscsi_traffic
      Applies to ONTAP 9.x Clustered Data ONTAP iSCSI Issue Indirect access on iSCSI SAN
    • Multiple luns show paths unavailable on the windows host
      https://kb.netapp.com/on-prem/ontap/OHW/OHW-KBs/Multiple_luns_are__show_paths_unavailable_on_the_windows_host
      Windows host Multiple luns show path unavailable on the windows host. MPIO_confguration on host shows: Controller: xxxxxxxxxxxxx (State: Active) Controller: xxxxxxxxxxx (State: Active) TPG_State: Acti...Windows host Multiple luns show path unavailable on the windows host. MPIO_confguration on host shows: Controller: xxxxxxxxxxxxx (State: Active) Controller: xxxxxxxxxxx (State: Active) TPG_State: Active/Unoptimized, TPG_Id: 1001, TP_Id: 2 Controller: xxxxxxxxxxxxxx (State: Active) TPG_State: Active/Unoptimized, TPG_Id: 1001, TP_Id: 4 Adapter: Microsoft iSCSI Initiator... (B|D|F: 000|000|000) Controller: xxxxxxxxxxxxxxx (State: Active) ONTAP shows the paths are in transitioning state:
    • E-Series logs report no iSCSi session in iSCSI-session-connections.txt file
      https://kb.netapp.com/on-prem/E-Series/Management-Apps-KBs/E-Series_logs_report_no_iSCSi_session_in_iSCSI-session-connections.txt_file
      Applies to Storage Arrays running 11.60 and higher Issue iSCSI sessions are missing in the summary section of iSCSI-session-connections.txt file. ==iSCSI Session Summary== Initiator iSCSI name: iqn.xx...Applies to Storage Arrays running 11.60 and higher Issue iSCSI sessions are missing in the summary section of iSCSI-session-connections.txt file. ==iSCSI Session Summary== Initiator iSCSI name: iqn.xxx.com.xxx:xxx Sessions/Connections to Controller A: Sessions/Connections to Controller B:
    • How to View Active Client Connections by Protocol in ONTAP
      https://kb.netapp.com/on-prem/ontap/Ontap_OS/OS-KBs/How_to_View_Active_Client_Connections_by_Protocol_in_ONTAP
      Applies to ONTAP 9 Cloud Volumes ONTAP Description A storage administrator wants to review the current/active client sessions to the ONTAP cluster, by data protocol
    • How to manually attach a LUN over iSCSI to a single host
      https://kb.netapp.com/on-prem/ontap/da/SAN/SAN-KBs/How_to_manually_attach_a_LUN_over_iSCSI_to_a_single_host
      Applies to ONTAP 9 Microsoft Windows Server 2012 Microsoft Windows Server 2016 Microsoft Windows Server 2019 Description This article describes the procedure to be followed to manually attach a LUN ov...Applies to ONTAP 9 Microsoft Windows Server 2012 Microsoft Windows Server 2016 Microsoft Windows Server 2019 Description This article describes the procedure to be followed to manually attach a LUN over iSCSI to a single host.