Search

Unable to access new LUNs after controller replacement
https://kb.netapp.com/on-prem/ontap/OHW/OHW-KBs/Unable_to_access_new_LUNs_after_controller_replacement
Unable to access new LUNs via HA-pair after controller replacement An error occurred while the system tried to claim a Multipath I/O (MPIO) path. The location of the failing path is described by the S...Unable to access new LUNs via HA-pair after controller replacement An error occurred while the system tried to claim a Multipath I/O (MPIO) path. The location of the failing path is described by the SCSI address (4, 0, 1, 0) (Port, Bus, Target, Lun). To resolve this issue, either reboot the system, or show hidden devices in Device Manager and try uninstalling the specific disk device indicated above, and then rescan for hardware changes.
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'.
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.
Does Cloud Volumes ONTAP on AWS Use Floating ISCSI interfaces?
https://kb.netapp.com/Cloud/Cloud_Volumes_ONTAP/Does_Cloud_Volumes_ONTAP_on_AWS_Use_Floating_ISCSI_interfaces
Applies to Cloud Volumes ONTAP ISCSI Answer Cloud volumes ONTAP relies on MPIO/ALUA and therefore does not support floating iSCSI inteterfaces. Additional Information For additional information regard...Applies to Cloud Volumes ONTAP ISCSI Answer Cloud volumes ONTAP relies on MPIO/ALUA and therefore does not support floating iSCSI inteterfaces. Additional Information For additional information regarding ALUA please see - Asymmetric Logical Unit Access (ALUA) support on NetApp Storage - Frequently Asked Questions
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.
Slow backups due to high latency on LUNs
https://kb.netapp.com/on-prem/ontap/da/SAN/SAN-KBs/Slow_backups_due_to_high_latency_on_LUNs
Latency on the LUNs show peaking to 50ms on during backups Volume/LUN on one node is accessed by its partner node multipath -ll from Linux host shows '0' for a hardware handler and paths are not group...Latency on the LUNs show peaking to 50ms on during backups Volume/LUN on one node is accessed by its partner node multipath -ll from Linux host shows '0' for a hardware handler and paths are not grouped by priority |-+- policy='round-robin 0' prio=1 status=active | `- 12:0:0:8 sdh 8:112 active ready running | `- 12:0:1:8 sdo 8:224 active ready running |-+- policy='round-robin 0' prio=1 status=enabled | `- 12:0:2:8 sdv 65:80 active ready running `-+- policy='round-robin 0' prio=1 status=enabled
E-Series Ubuntu multipath driver does not detect ALUA capabilities correctly
https://kb.netapp.com/on-prem/E-Series/SANtricity-OS-KBs/E-Series_Ubuntu_multipath_driver_does_not_detect_ALUA_capabilities_correctly
Applies to E-Series Ubuntu 20.04.3 LTS ALUA Issue After installing Ubuntu 20.04.3 LTS the multipath settings changes from '1 alua' to '1 rdac'
Can ALUA be disabled for an igroup on ONTAP 9?
https://kb.netapp.com/on-prem/ontap/da/SAN/SAN-KBs/Can_ALUA_be_disabled_for_an_igroup_on_ONTAP_9
Applies to ONTAP 9 and later Answer No, disabling ALUA on an igroup will produce SCSI behaviour that is not supported nor likely to work with any initiator. Therefore, this option has been removed fro...Applies to ONTAP 9 and later Answer No, disabling ALUA on an igroup will produce SCSI behaviour that is not supported nor likely to work with any initiator. Therefore, this option has been removed from ONTAP CLI on recent versions. Additional Information Asymmetric Logical Unit Access (ALUA) support on NetApp Storage - Frequently Asked Questions
Unable to access FC LUNs via HA-pair after controller replacement
https://kb.netapp.com/on-prem/ontap/OHW/OHW-KBs/Unable_to_access_FC_LUNs_via_HA-pair_after_controller_replacement
Unable to access FC LUNs via HA-pair after controller replacement An error occurred while the system tried to claim a Multipath I/O (MPIO) path. The location of the failing path is described by the SC...Unable to access FC LUNs via HA-pair after controller replacement An error occurred while the system tried to claim a Multipath I/O (MPIO) path. The location of the failing path is described by the SCSI address (4, 0, 1, 0) (Port, Bus, Target, Lun). To resolve this issue, either reboot the system, or show hidden devices in Device Manager and try uninstalling the specific disk device indicated above, and then rescan for hardware changes.