VPLEX: While creating Extent from VPLEX getting WARNING: Could not determine thin-capability for storage-volume

           

   Article Number:     535802                                   Article Version: 2     Article Type:    Break Fix 
   

 


Product:

 

VPLEX for All Flash,VPLEX GeoSynchrony,VPLEX GeoSynchrony 5.5 Service Pack 2 Patch 4,VPLEX GeoSynchrony 5.5 Service Pack 2 Patch 5,VPLEX GeoSynchrony 6.0,VPLEX GeoSynchrony 6.1,VPLEX Metro,VPLEX Local,VPLEX Series,VPLEX VS2,VPLEX VS6

 

Issue:

 

 

While creating an extent from a storage-volume on the VPLEX provisioned from an backend array you the following warning:   
   
   
    VPlexcli:/clusters/cluster-1> extent create -d xxxxx_7475_xxxxx01_02_data_xx     
      WARNING: Could not determine thin-capability for storage-volume: xxxxxx_7475_xxxxx01_02_data_xx. Any new extents supported by this storage-volume could potentially lose thin-capability.
   
   
     
                                                           

 

 

Cause:

 

 

This warning appears when the 'array re-discover' command  has not been performed after presenting a Storage-Volume/LUN to the VPLEX.   
   
   
     
                                                           

 

 

Change:

 

 

New Storage-Volumes have been presented to the VPLEX yet the 'array re-discover' command was not run after the storage was provisioned to the VPLEX.                                                           

 

 

Resolution:

 

 

Before performing the 'array re-discover' check the status and storage-volume to confirm if everything looks good.   
   
    To avoid this warning always  perform an 'array re-discoverimmediately after provisioning a new LUN(s)  to VPLEX.     
   
    1. Run the following command after provisioning storage to VPLEX:   

     
      VPlexcli:/> array re-discover --array <Array Name>-<array serial number> --cluster cluster-x   
   
          If you do not know the array name and serial number you can check those array's attached   
          to the VPLEX by using the command 'll /clusters/*/storage-element/storage-arrays'   
   
          Sample output:   
      VPlexcli:/> ll /clusters/*/storage-elements/storage-arrays/       
       
        /clusters/cluster-1/storage-elements/storage-arrays:       
        Name                         Connectivity  Auto    Ports                Logical       
        ---------------------------  Status        Switch  -------------------  Unit       
        ---------------------------  ------------  ------  -------------------  Count       
        ---------------------------  ------------  ------  -------------------  -------       
        EMC-CLARiiON-APM00xxxxxxxx  ok            true    0x500xxxxxxxx0084b,  9       
                                                          0x500xxxxxxxx0084b,       
                                                          0x500xxxxxxxx0084b,       
                                                          0x500xxxxxxxx0084b       
       
       
        /clusters/cluster-2/storage-elements/storage-arrays:       
        Name                         Connectivity  Auto    Ports                Logical       
        ---------------------------  Status        Switch  -------------------  Unit       
        ---------------------------  ------------  ------  -------------------  Count       
        ---------------------------  ------------  ------  -------------------  -------       
        EMC-CLARiiON-APM00xxxxxxxxx  ok            true   0x500xxxxxxxx0084b,  6       
                                                          0x500xxxxxxxx0084b,       
                                                          0x500xxxxxxxx0084b,       
                                                          0x500xxxxxxxx0084b
   
   
    2. After performing the 'array re-discover', try to create an extent again to confirm the issue is   
        resolved.   
   
    3. In case issue is still persist you will need to confirm if the backend array is configured with VPLEX   
        correctly. Refer to the best practices guide to properly connect a backend array to VPLEX.   
   
        Refer below link to VPLEX SAN Connectivity Best Practices Guide:   
            
   
    4. If everything looks correct, the end user may need open a Live Chat with Dell EMC Customer   
        Service for further assistance and mention this article.