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    • ONTAP LUN Available Space Size Different From VMware Datastore Free Space
      https://kb.netapp.com/on-prem/ontap/DM/System_Manager/SM-KBs/ONTAP_LUN_Available_Space_Size_Different_From_VMware_Datastore_Free_Space
      Applies to ONTAP System Manager v9.9.1 VMware ESXi v7.03 Issue In this example, the ONTAP System Manager has a configured volume that shows its Available Space of 4.79 TB VMware ESXi shows the associa...Applies to ONTAP System Manager v9.9.1 VMware ESXi v7.03 Issue In this example, the ONTAP System Manager has a configured volume that shows its Available Space of 4.79 TB VMware ESXi shows the associated Virtual Machine's datastore has a Free capacity of 6.91 TB
    • SnapCenter/-Drive clone LUN/RDM failing by not coming online in Windows
      https://kb.netapp.com/data-mgmt/SnapCenter/SC_KBs/SnapCenter_clone_LUN_RDM_failing_by_not_coming_online_in_Windows
      SnapCenter Plug-in for Windows (SCW) SnapDrive for Windows (SDW) When mounting a LUN from Snapshot (cloning) within the same virtual Windows Host, the NTFS Volume on the LUN's partition won't come onl...SnapCenter Plug-in for Windows (SCW) SnapDrive for Windows (SDW) When mounting a LUN from Snapshot (cloning) within the same virtual Windows Host, the NTFS Volume on the LUN's partition won't come online in Windows, failing the operation. Checking the logs, all previous parts of the operation have no issues: cloning the ONTAP volume mapping the LUN to ESXi igroup or physical/software iSCSI host, and for RDM, mapping the new ESXi seen disk to the VM)
    • Host side file system corruption due to power loss on ONTAP LUN
      https://kb.netapp.com/on-prem/ontap/Ontap_OS/OS-KBs/Host_side_file_system_corruption_due_to_power_loss_on_ONTAP_LUN
      Applies to ONTAP 9.X Issue Host side data corruption at file system layer due to loss of storage backend device
    • Host reboot causes other hosts to lose FC connections
      https://kb.netapp.com/on-prem/ontap/OHW/OHW-KBs/Host_reboot_causes_other_hosts_to_lose_FC_connections
      Applies to NetApp AFF-A200 Brocade Fibre Channel (FC) switches Windows and VMware ESXi hosts Issue When a host connected to NetApp storage via Brocade FC switches reboots, other hosts may lose connect...Applies to NetApp AFF-A200 Brocade Fibre Channel (FC) switches Windows and VMware ESXi hosts Issue When a host connected to NetApp storage via Brocade FC switches reboots, other hosts may lose connection to their NetApp FC LUNs
    • ONTAP Select system went offline after LUNs went offline
      https://kb.netapp.com/on-prem/ontap/ontap-select/Select-KBs/ONTAP_Select_system_went_offline_after_LUNs_went_offline
      Applies to ONTAP Select vCenter ESXi LUNs Issue ONTAP Select vm has gone offline after LUNs went offline
    • MetroCluster switchover AIX host LUN not accessible
      https://kb.netapp.com/on-prem/ontap/OHW/OHW-KBs/MetroCluster_switchover_AIX_host_LUN_not_accessible
      Applies to ONTAP 9.x Issue AIX hosts lost connectivity to LUNs during a switchover operation Issue was resolved via switchback Other hosts where not impacted for example VMware ESXi hosts
    • ONTAP select serving LUNs may panic when high amount of data is written to datastore
      https://kb.netapp.com/on-prem/ontap/ontap-select/Select-KBs/ONTAP_select_serving_LUNs_may_panic_when_high_amount_of_data_is_written_to_datastore
      Applies to ONTAP Select vSAN VMware Issue When a high amount of writes occur (on datastore VMFS-6) which causes VMDK to grow, the operation hangs up and ONTAP is rebooted with the following panic mess...Applies to ONTAP Select vSAN VMware Issue When a high amount of writes occur (on datastore VMFS-6) which causes VMDK to grow, the operation hangs up and ONTAP is rebooted with the following panic message: WAFL hung for <volname>. in SK process wafl_exempt01 on release 9.x (C) Normally a core dump will be generated which can be uploaded to a new or existing NetApp case to match it to this particular issue.
    • Hosts disconnect from LUNs after changes in fabric
      https://kb.netapp.com/on-prem/ontap/da/SAN/SAN-KBs/Hosts_disconnect_from_LUNs_after_changes_in_fabric
      Applies to AFF-A700 ONTAP 9.6 LUNs connected via Fibre Channel (FC) Windows hosts Issue After a change in the fabric (e.g. disconnecting a device), hosts unexpectedly disconnect from their LUNs Hosts ...Applies to AFF-A700 ONTAP 9.6 LUNs connected via Fibre Channel (FC) Windows hosts Issue After a change in the fabric (e.g. disconnecting a device), hosts unexpectedly disconnect from their LUNs Hosts do not reconnect automatically, and have to be rebooted
    • Newly created luns not visible on the host end
      https://kb.netapp.com/on-prem/ontap/da/SAN/SAN-KBs/Newly_created_luns_not_visible_on_the_host_end
      Newly created LUNs not visible on the host end. On the storage end, the luns could be seen online and mapped to the host. ncfascl111::> vserver fcp ping-igroup show -node ncfasndxxx|ncfasndxxx Vserver...Newly created LUNs not visible on the host end. On the storage end, the luns could be seen online and mapped to the host. ncfascl111::> vserver fcp ping-igroup show -node ncfasndxxx|ncfasndxxx Vserver Name WWPN Interface Name Status Status Verify igroup show -v command output and the initiator login status. If the initiators were not logged in to the storage, this means that the host is not establishing the connection to storage. Initiators: 10:00:00:90:fa:aa:xx:xx (not logged in)
    • Fractional reserve is being allocated even though no snapshots exist
      https://kb.netapp.com/on-prem/ontap/Ontap_OS/OS-KBs/Fractional_reserve_is_being_allocated_even_though_no_snapshots_exist
      Applies to ONTAP 9 Clustered Data ONTAP 8 ONTAP 8.x 7-Mode FlexPod Issue A volume containing a thin LUN with Fractional Reserve is 100% No snapshots exist on the volume The space reported in the volum...Applies to ONTAP 9 Clustered Data ONTAP 8 ONTAP 8.x 7-Mode FlexPod Issue A volume containing a thin LUN with Fractional Reserve is 100% No snapshots exist on the volume The space reported in the volume is greater than the space reported in the LUN After enabling Space-Allocation LUN not reflecting free space after deletion
    • LUNs are not seen in System Manager
      https://kb.netapp.com/on-prem/ontap/DM/System_Manager/SM-KBs/LUNs_are_not_seen_in_System_Manager
      Applies to ONTAP 9.8+ ONTAP System Manager (OSM) MetroCluster Issue Not all LUNs are not present OSM after upgrade or changing the LUN metadata The LUNs are visible with the full path in CLI