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An incorrect number of adapters is used for the MetroCluster backend connection

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Category:
metrocluster
Specialty:
metrocluster
Last Updated:

Applies to

  • ONTAP 9
  • FAS/AFF systems
  • Fabric-Attached MetroCluster
  • Cisco DS-C9148S-K9 switches

Issue

  • The following risk is reported in ActiveIQ for a MetroCluster system
An incorrect number of adapters is used for the MetroCluster backend connection.
  • The disks from some of the shelves do not have 8 paths as expected.

::> storage disk show -fields path-count -path-count !8 -type !LUN
disk    path-count
------- ----------
2.20.0  6
.
2.20.23 6
2.21.0  6
.
2.21.23 6
48 entries were displayed.

  • The system changes from "quad-path HA" to "multi-path HA" configuration.

::> system node run -node node1 -command sysconfig -a

NetApp Release 9.8P7: Tue Sep 14 14:42:02 EDT 2021
System ID: ######(Node1); partner ID: ######(Node2)
System Serial Number: #######(Node1)
System Rev: A4
System Storage Configuration: Multi-Path HA

  • The remote ATTO bridge are missing from both nodes of the local site. However the missing bridge is seen from the remote site.

::> system node run -node node1 -command sysconfig -a

Remote site

  FC-to-SAS Bridge:
        Site2-FabricS1:1-9.126L0          : ATTO     FibreBridge7500N 3.25  FB7500N####82
        Site1-FabricS1:1-9.126L0          : ATTO     FibreBridge7500N 3.25  FB7500N####70
        Site1-FabricS1:1-9.shelf10 : DS224-12  Firmware rev. IOM12 A: 0281  IOM12 B: 0281
        Site1-FabricS1:1-9.shelf11 : DS224-12  Firmware rev. IOM12 A: 0281  IOM12 B: 0281
        Site2-FabricS1:1-9.shelf20 : DS224-12  Firmware rev. IOM12 A: 0281  IOM12 B: 0281
        Site2-FabricS1:1-9.shelf21 : DS224-12  Firmware rev. IOM12 A: 0281  IOM12 B: 0281

Local site

 FC-to-SAS Bridge:
     Site1-FabricS1:1-9.126L0          : ATTO     FibreBridge7500N 3.25  FB7500N####70   >>>> FB7500N####82 missing
     Site1-FabricS1:1-9.shelf10 : DS224-12  Firmware rev. IOM12 A: 0281  IOM12 B: 0281
     Site1-FabricS1:1-9.shelf11 : DS224-12  Firmware rev. IOM12 A: 0281  IOM12 B: 0281   >>>> Shelves 20 and 21 missing
 

  • On both nodes of the local site, the missing bridges are connected to the same Fabric switch.
  • The switch port connected to the missing ATTO bridge is online.

Site2-FabricS1# show interface brief

-----------------------------------------------------------------------------------------
Interface  Vsan   Admin  Admin   Status       SFP    Oper  Oper   Port     Logical
                  Mode   Trunk                       Mode  Speed  Channel   Type
                         Mode                              (Gbps)
----------------------------------------------------------------------------------------- 
fc1/8       40     F      off     up           swl   F      16     --       edge     
fc1/9       40     F      off     up           swl   F      16     --       edge      

  • There are no issues seen with zonning configuration on the switch.

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