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    • How to modify the home port and/or home node of an existing clustered ONTAP logical interface serving a SAN/ block protocol
      https://kb.netapp.com/on-prem/ontap/da/SAN/SAN-KBs/How_to_modify_the_home_port_and_or_home_node_of_an_existing_clustered_ONTAP_logical_interface_serving_a_SAN_block_protocol
      During normal operations, there is no need for SAN logical interfaces (LIFs) to move from one cluster node or physical port to another, but there are several circumstances in which non-disruptive migr...During normal operations, there is no need for SAN logical interfaces (LIFs) to move from one cluster node or physical port to another, but there are several circumstances in which non-disruptive migration of LIFs might be required: This does involve an interruption in I/O on the LIF to be moved, but since redundant paths and automatic path selection through ALUA are part of any clustered ONTAP SAN solution; this should simply cause hosts to retry and then move I/O to another LIF.
    • What is the information reported by the fcp stats command?
      https://kb.netapp.com/on-prem/ontap/da/SAN/SAN-KBs/What_is_the_information_reported_by_the_fcp_stats_command
      KBytes In: The count of KiloBytes of data that has been received by the adapter. Kbytes Out: The count of KiloBytes of data that has been sent by the adapter. FCF Ad Timeouts: The number of times that...KBytes In: The count of KiloBytes of data that has been received by the adapter. Kbytes Out: The count of KiloBytes of data that has been sent by the adapter. FCF Ad Timeouts: The number of times that the virtual adapter has sent FCF Advertisements without receiving a response in an acceptable amount of time. Adapter Qfulls: The number of SCSI queue full responses generated by the adapter. Vendor Name: The name of the vendor for the SFP.
    • VMware reports lost access to multiple volumes and performance impact
      https://kb.netapp.com/on-prem/ontap/OHW/OHW-KBs/VMware_reports_lost_access_to_multiple_volumes_and_performance_impact
      Applies to VMware VMware alarms report lost access to multiple volumes for a few seconds Lost access to volume xyz due to connectivity issues. Recovery attempt is in progress and outcome will be repor...Applies to VMware VMware alarms report lost access to multiple volumes for a few seconds Lost access to volume xyz due to connectivity issues. Recovery attempt is in progress and outcome will be reported shortly. Performance impact reported by end users ONTAP System Manager reports higher latency than expected for same IOPS at protocol layer ONTAP events report error, indicating one adapter/Fabric impacted fcp.io.status Adapter:4c IO WQE failure Ext_Status 0x16
    • Brocade switch reboot/hung with no reason listed
      https://kb.netapp.com/on-prem/Switches/Brocade-KBs/Brocade_switch_reboot_hung_with_no_reason_listed
      2023/02/23-01:41:34:983319, [PLAT-5093], 1443441/0, SLOT 1 | CHASSIS, INFO, switch, Core Blade Power fail Slot 7 pwr_fail 0x30 pwr_fail_msk 0x33 , modular_ctrl.c, line: 3132, comp:emd, ltime:2023/02/2...2023/02/23-01:41:34:983319, [PLAT-5093], 1443441/0, SLOT 1 | CHASSIS, INFO, switch, Core Blade Power fail Slot 7 pwr_fail 0x30 pwr_fail_msk 0x33 , modular_ctrl.c, line: 3132, comp:emd, ltime:2023/02/23-01:41:34:983148 There aren't any core files that points to a software problem or other clues to point at a hardware issue for either unit and these events happened at roughly the same time on both units, which looks like a power event.
    • FCP initiator not logged in on VTIC
      https://kb.netapp.com/on-prem/ontap/da/SAN/SAN-KBs/FCP_initiator_not_logged_in_on_VTIC
      Applies to Data ONTAP operating in 7-mode Issue Initiators not logged in on unoptimized (or partner) paths.
    • What is the difference between LINK NOT CONNECTED and LINK DISCONNECTED states on FCP target adapters?
      https://kb.netapp.com/on-prem/ontap/OHW/OHW-KBs/What_is_the_difference_between_LINK_NOT_CONNECTED_and_LINK_DISCONNECTED_states_on_FCP_target_adapters
      The following chart breaks down all states of the FCP adapters, and the behavior surrounding them: The driver has finished initializing the firmware. However, the link is not physically connected so t...The following chart breaks down all states of the FCP adapters, and the behavior surrounding them: The driver has finished initializing the firmware. However, the link is not physically connected so the adapter is offline. The adapter is online for FCP traffic. The adapter is offline due to Fibre Channel link offline event. The adapter is offline for FCP traffic. A user manually took the adapter offline, or the system automatically took the adapter offline.
    • Tiered data using Azure File Sync not reclaiming space on NetApp LUN
      https://kb.netapp.com/on-prem/ontap/da/SAN/SAN-KBs/Tiered_data_using_Azure_File_Sync_not_reclaiming_space_on_NetApp_LUN
      Applies to ONTAP 9.x ESXi 6.7 Update 3 Windows Server 2019 (Guest) Azure File Sync Issue LUN's used space is not reflecting post tiering data using Azure File Sync. In the host, the space shows as rec...Applies to ONTAP 9.x ESXi 6.7 Update 3 Windows Server 2019 (Guest) Azure File Sync Issue LUN's used space is not reflecting post tiering data using Azure File Sync. In the host, the space shows as reclaimed, once tiering is completed, however in the ONTAP System Manager, there are no changes visible even after waiting for a long time. Issue is observed only with older data, as any new data which is tiered, reflects immediately indicating successful space reclamation.
    • High latency on database log volumes
      https://kb.netapp.com/on-prem/ontap/Perf/Perf-KBs/High_latency_on_database_log_volumes
      Applies to ONTAP Issue High latency in a database environment reported against the controller NetApp Unified Manager Insight etc. This article only applies to situations where the controller is report...Applies to ONTAP Issue High latency in a database environment reported against the controller NetApp Unified Manager Insight etc. This article only applies to situations where the controller is reporting high latency for database logging volumes/LUNs
    • When is in-order delivery (IOD) required and how is it set?
      https://kb.netapp.com/on-prem/ontap/da/SAN/SAN-KBs/When_is_in_order_delivery_IOD_required_and_how_is_it_set
      If one switch in the fabric delivers out-of-order exchanges, the exchanges are delivered to the target out-of-order, regardless of the policy configured on other switches in the fabric. Out of order d...If one switch in the fabric delivers out-of-order exchanges, the exchanges are delivered to the target out-of-order, regardless of the policy configured on other switches in the fabric. Out of order delivery in these environments should not occur if the switches are configured according to the “Switch Configuration for Fabric MetroCluster” which is posted on the NOW site.
    • Host-side SCSI Timeouts when using iSCSI
      https://kb.netapp.com/on-prem/ontap/da/SAN/SAN-KBs/Host-side_SCSI_Timeouts_when_using_iSCSI
      Why is the storage system generating iSCSI LUN Reset/Target Warm Reset/New session messages? [iscsi.notice:notice]: ISCSI: iswta, LUN Reset (from initiator iqn.1991-05.com.microsoft:exch), aborting al...Why is the storage system generating iSCSI LUN Reset/Target Warm Reset/New session messages? [iscsi.notice:notice]: ISCSI: iswta, LUN Reset (from initiator iqn.1991-05.com.microsoft:exch), aborting all SCSI commands on lun 0 A connection to the target was lost, but Initiator successfully reconnected to the target. Dump data contains the target name. The CDB is given in the dump data. Initiator sent a task management command to reset the target. The target name is given in the dump data.
    • vSphere host cannot access LUN after update using Qlogic
      https://kb.netapp.com/on-prem/ontap/OHW/OHW-KBs/vSphere_host_cannot_access_LUN_after_update_using_Qlogic
      Applies to ONTAP VMware ESXi 6.7 VMware ESXi 6.5 Qlogic Issue After upgrading ESXi to 6.7 update 3 with OEM install media with embedded driver for OEM QLE2560 (qlnativefc 3.1.36) LUN is not accessible...Applies to ONTAP VMware ESXi 6.7 VMware ESXi 6.5 Qlogic Issue After upgrading ESXi to 6.7 update 3 with OEM install media with embedded driver for OEM QLE2560 (qlnativefc 3.1.36) LUN is not accessible All paths lost after 2 node MetroCluster upgrade with ESXi 6.5 u3 and OEM qlnativefc 3.1.16.0 with Firmware Version: 9.06.02 ESXi reports "all paths down" 1 second after initiators login to storage