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    • Microsoft MPIO shows incorrect number of paths for luns
      https://kb.netapp.com/on-prem/ontap/OHW/OHW-KBs/Microsoft_MPIO_shows_incorrect_number_of_paths_for_luns
      Applies to Hyper V ONTAP 9 onwards MPIO Issue Some of the luns show odd number paths, instead if even paths from the host side: Example: LUN Properties | Read(MB)|Wrap(KB)|Written(MB)|Wrap(KB)|IoError...Applies to Hyper V ONTAP 9 onwards MPIO Issue Some of the luns show odd number paths, instead if even paths from the host side: Example: LUN Properties | Read(MB)|Wrap(KB)|Written(MB)|Wrap(KB)|IoErrors| #Reads|#Wrap|#Writes|#Wrap|PathFail| | 15| 0| 7| 0| 0| 2280| 0| 1069| 0| 0| LoadBalancePolicy Round Robin with Subset NumberPaths 7 Paths: |SLUA| ALUA|FP|OP|PW|Pref|Prim| | 0|Impl-Only| 0| 1| 0| 0| 1| | 0|Impl-Only| 0| 0| 0| 0| 1|
    • 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.
    • iSCSI Linux client LUN paths not optimal for ALUA
      https://kb.netapp.com/on-prem/ontap/OHW/OHW-KBs/iSCSI_Linux_client_LUN_paths_not_optimal_for_ALUA
      Database msdb was shutdown due to error 9001 in routine 'XdesRMFull::CommitInternal'. Restart for non-snapshot databases will be attempted after all connections to the database are aborted. The operat...Database msdb was shutdown due to error 9001 in routine 'XdesRMFull::CommitInternal'. Restart for non-snapshot databases will be attempted after all connections to the database are aborted. The operating system returned error 1117(The request could not be performed because of an I/O device error.) to SQL Server during a read at offset x in file 'x:\sqlsystemdb\mssqlserverx\MSSQL\DATA\tempdb.mdf'.
    • iSCSI luns do not show up on Microsoft Host
      https://kb.netapp.com/on-prem/ontap/OHW/OHW-KBs/iSCSI_luns_do_not_show_up_on_Microsoft_Host
      Applies to ONTAP 9 iSCSI Windows Issue iSCSI luns do not show up on the host when they are configured from one of the NetApp nodes From other nodes, there's no problem with access
    • How to migrate from Data ONTAP DSM 4.1p1 to Microsoft native DSM
      https://kb.netapp.com/on-prem/ontap/OHW/OHW-KBs/How_to_migrate_from_Data_ONTAP_DSM_4.1p1_to_Microsoft_native_DSM
      Applies to Windows Server 2008 SP2 Windows Server 2008 R2 SP1 Windows Server 2012 R2 Windows Server 2012 Windows Server 2016 Data ONTAP DSM is now end of version support since December 31, 2019. Descr...Applies to Windows Server 2008 SP2 Windows Server 2008 R2 SP1 Windows Server 2012 R2 Windows Server 2012 Windows Server 2016 Data ONTAP DSM is now end of version support since December 31, 2019. Description This procedure includes un-installation of Data ONTAP DSM and installation of WUHU 7.1(Windows Unified Host Utilities) to make the system ready for Microsoft native MSDSM for Windows MPIO to work with NetApp storage.
    • E-Series Microsoft Hyper-V cluster shared volume disconnect
      https://kb.netapp.com/on-prem/E-Series/Management-Apps-KBs/E-Series_Microsoft_Hyper-V_cluster_shared_volume_disconnect
      NetApp SANtricity Storage Manager NetApp E-Series Microsoft Windows Hyper-V E-Series with Hyper-V cluster shared volumes (CSV) periodically disconnected with no alert on the E-Series No new path error...NetApp SANtricity Storage Manager NetApp E-Series Microsoft Windows Hyper-V E-Series with Hyper-V cluster shared volumes (CSV) periodically disconnected with no alert on the E-Series No new path error increase detected from storage target ports Configuration verified "E-Series SAN Host" in Interoperability Matrix Tool IMT Link :ITN :..........IOs..........:ITN :............IOs...........:.........Busy.........Idle. Ch H/D STP Down :cnt : Open Completed Errs :cnt : Qd Open Completed Errs: Ms Ms
    • How to configure ONTAP MPIO for Windows
      https://kb.netapp.com/on-prem/ontap/OHW/OHW-KBs/How_to_configure_ONTAP_MPIO_for_Windows
      Applies to ONTAP 9.x Microsoft Windows Server Description How to set up iSCSI multipath IO (MPIO) and Asymmetric Logical Unit Access (ALUA) for Microsoft Windows Server and ONTAP.
    • One LUN displaying as multiple drives in Windows disk management
      https://kb.netapp.com/on-prem/ontap/da/SAN/SAN-KBs/One_LUN_displaying_as_multiple_drives_in_Windows_disk_management
      Applies to MPIO(multipath input/output) Issue One LUN displaying as multiple drives in Windows disk management
    • Windows host Fail Over Only MPIO policy required for CyberArk Cluster Quorum disk
      https://kb.netapp.com/on-prem/ontap/Ontap_OS/OS-KBs/Windows_host_Fail_Over_Only_MPIO_policy_required_for_CyberArk_Cluster_Quorum_disk
      Applies to ONTAP 9.X CyberArk Issue CyberArk Quorum disk requires host side MPIO policy to be failover-only Windows Host is currently set to round robin with subset and will not allow failover-only po...Applies to ONTAP 9.X CyberArk Issue CyberArk Quorum disk requires host side MPIO policy to be failover-only Windows Host is currently set to round robin with subset and will not allow failover-only policy settings
    • iSCSI paths lost after MetroCluster decommission procedure
      https://kb.netapp.com/on-prem/ontap/OHW/OHW-KBs/iSCSI_paths_lost_after_MetroCluster_decommission_procedure
      Applies to ONTAP 9.x Microsoft Windows Server Issue After performing offline MetroCluster node decommission, iSCSI hosts have only one active path to LUN Multipath is not establishing via SnapDrive
    • I/O error occurs on an initiator host after a nodeOffline alert occurs
      https://kb.netapp.com/on-prem/solidfire/Element_OS_Kbs/I_O_error_occurs_on_an_initiator_host_after_a_nodeOffline_alert_occurs
      I/O error occurs on an initiator host after a nodeOffline alert occurs due to the node failure. Logs on the host report I/O error before 120 seconds pass after iSCSI ping timeout occurs. May 14 22:10:...I/O error occurs on an initiator host after a nodeOffline alert occurs due to the node failure. Logs on the host report I/O error before 120 seconds pass after iSCSI ping timeout occurs. May 14 22:10:26 initiatorhost iscsid: Kernel reported iSCSI connection 9:0 error (1022 - Invalid or unknown error code) state (3) May 14 22:10:41 initiatorhost kernel: blk_update_request: I/O error, dev sdi, sector 490039561