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    • SAS Lane on optical SAS cable down due to cross connection
      https://kb.netapp.com/on-prem/ontap/mc/MC-KBs/SAS_Lane_on_optical_SAS_cable_down_due_to_cross_connection
      Applies to Optical SAS Cable Sysconfig -a output shows a SAS Lane as No Signal or unkown slot 2: SAS Host Adapter 2b (PMC-Sierra PM8001 rev. C, SAS, <UP>) MFG Part Number: USI 6086-000010-07 rev. Part...Applies to Optical SAS Cable Sysconfig -a output shows a SAS Lane as No Signal or unkown slot 2: SAS Host Adapter 2b (PMC-Sierra PM8001 rev. C, SAS, <UP>) MFG Part Number: USI 6086-000010-07 rev. Part number: 111-00341+F2 Serial number: ST063C6K048 Phy State: [4] Enabled, 6.0 Gb/s [5] No Signal, n/a <----- Lane is not working correctly [6] Enabled, 6.0 Gb/s QSFP Vendor: Molex Inc. QSFP Part Number: 112-00272+A0 QSFP Type: Optical (1490nm DFB) 5m ID:00 QSFP Serial Number: 93AG13502P0074
    • 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
    • SAS Lane on optical SAS cable down due to broken cable/patch panel
      https://kb.netapp.com/on-prem/ontap/mc/MC-KBs/SAS_Lane_on_optical_SAS_cable_down_due_to_broken_cable_patch_panel
      Applies to Optical SAS Cable Patch Panel Sysconfig -a output shows a SAS Lane as No Signal or unkown slot 2: SAS Host Adapter 2b (PMC-Sierra PM8001 rev. C, SAS, <UP>) MFG Part Number: USI 6086-000010-...Applies to Optical SAS Cable Patch Panel Sysconfig -a output shows a SAS Lane as No Signal or unkown slot 2: SAS Host Adapter 2b (PMC-Sierra PM8001 rev. C, SAS, <UP>) MFG Part Number: USI 6086-000010-07 rev. Part number: 111-00341+F2 Serial number: ST063C6K048 Phy State: [4] Enabled, 6.0 Gb/s [5] No Signal, n/a <----- Lane is not working correctly QSFP Vendor: Molex Inc. QSFP Part Number: 112-00272+A0 QSFP Type: Optical (1490nm DFB) 5m ID:00 QSFP Serial Number: 93AG13502P0074
    • 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