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    • Not all the ACP firmwares updated for shelves with IOM6
      https://kb.netapp.com/on-prem/ontap/OHW/OHW-KBs/Not_all_the_ACP_firmwares_updated_for_shelves_with_IOM6
      Applies to IOM6 ACP firmware version 2.10 Issue Not all the ACP firmware are automatically updated in shelves with IOM6. The IOM6 modules are running different ACP fw. versions no hardware issues or e...Applies to IOM6 ACP firmware version 2.10 Issue Not all the ACP firmware are automatically updated in shelves with IOM6. The IOM6 modules are running different ACP fw. versions no hardware issues or errors being reported.
    • "sysconfig -a" reports Shelf Serial Number instead of Shelf ID after IOM reseat/replacement
      https://kb.netapp.com/on-prem/ontap/OHW/OHW-KBs/sysconfig_a_reports_Shelf_Serial_Number_instead_of_Shelf_ID_after_IOM_reseat_replacement
      sysconfig -a displays shelf serial number instead of the shelf ID in front the disks: sasadmin expander_map might display an invalid/alternate shelf ID : Level 10: WWN 50050cc104fd6d3f, ID 150, Serial...sysconfig -a displays shelf serial number instead of the shelf ID in front the disks: sasadmin expander_map might display an invalid/alternate shelf ID : Level 10: WWN 50050cc104fd6d3f, ID 150, Serial Number ' SHM09797XXXXX', Product 'DS424IOM3 ', Rev '0172', Slot B You might receive a duplicate shelf ID error in the messages log: [sas.shelf.conflict:error]: At least two SAS disk shelves have the same disk shelf ID.
    • EMS log reports the event "sas.port.down:warning"
      https://kb.netapp.com/on-prem/ontap/OHW/OHW-KBs/EMS_log_reports_the_event_sas_port_down_warning
      [?] Mon Jun 01 20:49:22 CEST [node_name: pmcsas_intrd: sas.port.down:warning]: SAS port "0b" went down. [?] Mon Jun 01 20:49:40 CEST [node_name: dsa_worker5: ses.IOMLogCrash:debug]: Encountered a cras...[?] Mon Jun 01 20:49:22 CEST [node_name: pmcsas_intrd: sas.port.down:warning]: SAS port "0b" went down. [?] Mon Jun 01 20:49:40 CEST [node_name: dsa_worker5: ses.IOMLogCrash:debug]: Encountered a crash in Exception Log on IOM module B SN [serial_number] FW 0181, channel 0b.03.99 shelf ID 3 shelf SN [serial_number]. [?] Mon Jun 01 20:49:49 CEST [node_namee: pmcsas_timeout_0: sas.cable.degraded:warning]: Cable attached to SAS port "0b" is functioning in a degraded mode.
    • How to map SAS cable connecting to which port on IOM3/IOM6 from command line
      https://kb.netapp.com/on-prem/ontap/OHW/OHW-KBs/How_to_map_SAS_cable_connecting_to_which_port_on_IOM3_IOM6_from_command_line
      Applies to DS2246 DS4243 DS4246 DS4486 I/O Module (IOM) 3 I/O Module (IOM) 6 Description This article explains how to map SAS cable connecting to which port on IOM3/IOM6 from command line.
    • Both nodes are reporting ses.status.ModuleWarning for the same IOM6 module
      https://kb.netapp.com/on-prem/ontap/OHW/OHW-KBs/Both_nodes_are_reporting_ses.status.ModuleWarning_for_the_same_IOM6_module
      Mon Oct 23 10:26:14 KST [node01: dsa_worker3: ses.status.ACPWarn:debug]: DS2246 (S/N SHFFGxxxxxxxxxx) shelf 2 on channel 0a ACP Processor warning for SAS shelf ACP processor 2: communication error. ; ...Mon Oct 23 10:26:14 KST [node01: dsa_worker3: ses.status.ACPWarn:debug]: DS2246 (S/N SHFFGxxxxxxxxxx) shelf 2 on channel 0a ACP Processor warning for SAS shelf ACP processor 2: communication error. ; Alternate Control Path hardware failed This module is on the rear of the shelf at the top right, on shelf module B.
    • IOM upgrade requires a cold swap
      https://kb.netapp.com/on-prem/ontap/OHW/OHW-KBs/IOM_upgrade_requires_a_cold_swap
      This article describes the steps required for a cold-swap upgrade. When replacing the IOM module in a shelf with a different model it requires the following components to be powered off during the cha...This article describes the steps required for a cold-swap upgrade. When replacing the IOM module in a shelf with a different model it requires the following components to be powered off during the change: ALL nodes that connect to the impacted shelves. ALL ATTO bridges (if applicable) that connect to the impacted shelves. The shelves of which the IOM model will be changed. IOM3 to IOM6 IOM3 to IOM12* IOM6 to IOM12* *Be aware of SAS port differences between IOM3/IOM6 (QSFP) and IOM12 (MiniSAS-HD)
    • Drive Bypassed Causing Controller to Enter a Mixed-Path State
      https://kb.netapp.com/on-prem/ontap/OHW/OHW-KBs/Drive_Bypassed_Causing_Controller_to_Enter_a_Mixed-Path_State
      PHY/BAY STATE ON Cnt Cnt Cnt Count Count Count Prob Cnt Cnt Affiliation ::>system node run -node <nodename> -command sysconfig -a NetApp Release 9.5P2: Thu Mar 14 10:01:49 EDT 2019 System ID: 01234567...PHY/BAY STATE ON Cnt Cnt Cnt Count Count Count Prob Cnt Cnt Affiliation ::>system node run -node <nodename> -command sysconfig -a NetApp Release 9.5P2: Thu Mar 14 10:01:49 EDT 2019 System ID: 0123456789 (NODE-01); partner ID: 0123456788 (NODE-02) System Serial Number: 0123456789012 (NODE-01) System Rev: A4 System Storage Configuration: Mixed-Path ...
    • No In-Band ACP after adding shelves with IOM12 in an Out-of-Band cluster
      https://kb.netapp.com/on-prem/ontap/OHW/OHW-KBs/No_In-Band_ACP_after_adding_shelves_with_IOM12_in_an_Out-of-Band_cluster
      Shelves with 6Gbps I/O Modules (IOM6) Shelves with 12Gbps I/O Modules (IOM12) Cluster configured in Out-of-Band ACP with IOM6 shelves node_1 2.12.B 1.2.02.10 02.10 iom6 active node_1 2.12.A 1.2.02.10 ...Shelves with 6Gbps I/O Modules (IOM6) Shelves with 12Gbps I/O Modules (IOM12) Cluster configured in Out-of-Band ACP with IOM6 shelves node_1 2.12.B 1.2.02.10 02.10 iom6 active node_1 2.12.A 1.2.02.10 02.10 iom6 active node_1 2.11.B 1.2.02.10 02.10 iom6 active node_1 2.11.A 1.2.02.06 02.06 iom6 active node_2 2.12.B 1.2.02.10 02.10 iom6 active node_2 2.12.A 1.2.02.10 02.10 iom6 active node_2 2.11.B 1.2.02.10 02.10 iom6 active node_2 2.11.A 1.2.02.06 02.06 iom6 active