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    • How to troubleshoot optical SAS cable issues?
      https://kb.netapp.com/on-prem/ontap/mc/MC-KBs/How_to_troubleshoot_optical_SAS_cable_issues
      Applies to Streched MetroCluster ONTAP 9 ONTAP 8 Description This article describes how to troubleshoot optical SAS cable issues
    • Upgrading a 2 Node MetroCluster to ONTAP 9.7 removes firewall policies
      https://kb.netapp.com/on-prem/ontap/OHW/OHW-KBs/Reason___Apply_failed_for_Object__vs_firewall_policies_view_Method__baseline
      Failed Row : Table Name: vs_firewall_policies_view, Operation: get, Fields: portmap 0.0.0.0/0 -Failed Reason : Apply failed for Object: vs_firewall_policies_view Method: baseline. Failed Row : Table N...Failed Row : Table Name: vs_firewall_policies_view, Operation: get, Fields: portmap 0.0.0.0/0 -Failed Reason : Apply failed for Object: vs_firewall_policies_view Method: baseline. Failed Row : Table Name: vs_firewall_policies_view, Operation: get, Fields: https 0.0.0.0/0 -Failed Reason : Apply failed for Object: vs_firewall_policies_view Method: baseline.
    • How to manually set the speed of an FC-VI card in a Stretched MetroCluster to 2G, 4G or 8G
      https://kb.netapp.com/on-prem/ontap/mc/MC-KBs/How_to_manually_set_the_speed_of_an_FC_VI_card_in_a_Stretched_MetroCluster_to_2G_4G_or_8G
      In a Stretched MetroCluster configuration the use of an FC-VI card for the HA Interconnect is mandatory. Note: For more details on which platforms a specific FC-VI card is support please refer to the ...In a Stretched MetroCluster configuration the use of an FC-VI card for the HA Interconnect is mandatory. Note: For more details on which platforms a specific FC-VI card is support please refer to the HardWareUniverse (HWU) By default, the FC-VI card connects at the highest common speed of both cards. However, to achieve longer distances, the connecting speed of the FC-VI card might have to be set to speeds lower than the maximum speed supported by the card.
    • What is QSFP and Optical SAS?
      https://kb.netapp.com/on-prem/ontap/mc/MC-KBs/What_is_QSFP_and_Optical_SAS
      Optical SAS cables are available in both multimode and single mode fiber types, and are compatible with existing optical patch panel infrastructure. Optical SAS cables are designed to provide greater ...Optical SAS cables are available in both multimode and single mode fiber types, and are compatible with existing optical patch panel infrastructure. Optical SAS cables are designed to provide greater flexibility in configurations of storage controllers and associated disk shelves. Optical SAS cables can also be used in place of FibreBridge 6500N devices in Stretch MetroCluster configurations. In stretch MetroCluster configurations optical SAS cables can be used in place of FibreBridge devices.
    • Individual PHYs disabled in a SAS port using optical cables
      https://kb.netapp.com/on-prem/ontap/mc/MC-KBs/Individual_PHYs_disabled_in_a_SAS_port_using_optical_cables
      ::> run -node <node_name> -command sysconfig -a slot 0: SAS Host Adapter 0a (PMC-Sierra PM8001 rev. C, SAS, <UP>) Phy State: [0] Disabled QSFP Type: Optical (850nm VCSEL) 0m ID:00 ::> run -node local ...::> run -node <node_name> -command sysconfig -a slot 0: SAS Host Adapter 0a (PMC-Sierra PM8001 rev. C, SAS, <UP>) Phy State: [0] Disabled QSFP Type: Optical (850nm VCSEL) 0m ID:00 ::> run -node local -command storage show shelf -a Shelf UID: 50:0a:09:80:03:8d:5e:87 Shelf state: ONLINE Module state: OK Partial Path Link Invalid Running Loss Phy CRC Phy Disk Port Timeout Rate DWord Disparity Dword Reset Error Change Id State Value (ms) (Gb/s) Count Count Count Problem Count Count