VMware ESXi: Lost path redundancy to storage device DeviceName. Path vmhbaN:Cx:Ty:Lz is down. Affected datastores: DatastoreName

           

   Article Number:     495254                                   Article Version: 3     Article Type:    Break Fix 
   

 


Product:

 

VMware ESXi,Symmetrix

 

Issue:

 

 

The Task and Events tab of the VMware ESXi host on the vSphere Client reports the following error under Events:   

          
   
      Lost path redundancy to storage device DeviceName. Path vmhbaN:Cx:Ty:Lz is down. Affected datastores: DatastoreName   
   
    This indicates a single point of failure and potential performance impact in the virtual machines currently accessing the storage device.                                                           

 

 

Cause:

 

 

In this case, there was no zoning configuration for the VMware ESXi host.                                                           

 

 

Resolution:

 

 

To determine the actual failure, or to eliminate possible issues:   

         
  1.         Check the host grabs for the impacted VMware ESXi host.      
  2.      
  3.         Check the storage array.     
  4.      
  5.         Check the switch configuration / zoning.     
  6.    
    In this particular case:   
         
  •         No errors were found on the HBA, or the devices in the VMkernel logs.     
  •      
  •         It was found that at the same time the error was reported, RSCN messages were sent from the switch to HBA vmhbaX indicating a change in the zoneset of the fabric, and paths were down. Then another RSCN messages were sent to vmhbaX and the paths were up again.     
  •    
    The user verified that there is no zoning configuration for the ESXi host.   
         
  •         Please refer to VMware Knowledge Article kb.vmware.com/kb/1009554 for the complete troubleshooting steps.     
  •      
  •         This article apply for other Dell EMC storage arrays.     
  •      
  •         The events were found in (localcli_storage-san-fc-events-get and hostd.log) These files can be found in the vmsupport bundle.     
  •