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AppSync: VPLEX Device mapping failed for device: X with error: extent_X is not 1:1 created on storage volume X and is not supported by AppSync

Zusammenfassung: AppSync GUI reports the following error when the extent is smaller that the volume. VPLEX Devi VPlex volume being 1:1 mapped;ce mapping failed for device:device_X with error: Device:device_X extent:extent_X is not 1:1 created on storage volume:X and is not supported by AppSync. Only fully encapsulated VPLEX volumes are supported. ...

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Symptome

  • Customer is provisioning storage on the VPlex.
  • Customer had performed a device/extent migration on the VPlex.


  • AppSync GUI and logs report the VPlex virtual-volume as not being 1:1 mapped.
  • AppSync is unable to map the VPlex virtual-volume.
  • AppSync GUI shows the following error messages against a VPlex volume:
VPLEX Device mapping failed for device:device_X with error: Device:device_X extent:extent_X is not 1:1 created on storage volume:X and is not supported by AppSync.

Ursache

AppSync only supports VPlex volumes which were created using the full capacity of a storage-volume.
Only fully encapsulated VPLEX volumes are supported by AppSync.

Lösung

The following steps are to be performed on the VPlex. In the following troubleshooting procedure, a fictitious local virtual-volume, 'device_Symm1000_00AB_1_vol' is used as an example. 
 
1. Log in to the VPlexcli and perform a 'show-use-hierarchy' against the VPlex virtual-volume of interest: 
 
VPlexcli:/> show-use-hierarchy -t /clusters/cluster-1/virtual-volumes/device_Symm1000_00AB_1_vol
storage-view: VPLEX_STORAGE_VIEW (cluster-1)
  virtual-volume: device_Symm1000_00AB_1_vol (2T, local @ cluster-1, running)
    local-device: device_Symm1000_00AB_1 (2T, raid-0, cluster-1)
      extent: extent_Symm1000_00AB_1 (2T)
        storage-volume: Symm1000_00AB (2T)
          logical-unit: VPD83T3:60000970000196801000533000000111
            storage-array: EMC-SYMMETRIX-196801000

2. Note that the virtual-volume is 1:1 mapped: virtual-volume to storage-volume:
 

VPlexcli:/> show-use-hierarchy -t /clusters/cluster-1/virtual-volumes/device_Symm1000_003B_1_vol
storage-view: VPLEX_STORAGE_VIEW (cluster-1)
  virtual-volume: device_Symm1000_00AB_1_vol (2T, local @ cluster-1, running)
    local-device: device_Symm1000_00AB_1 (2T, raid-0, cluster-1)
      extent: extent_Symm1000_00AB_1 (2T)
        storage-volume: Symm1000_00AB (2T)
          logical-unit: VPD83T3:60000970000196801000533000000111
            storage-array: EMC-SYMMETRIX-196801000


3. If the virtual-volume reports, 'expandable by X' where X is the respective size, then AppSync will report this volume as not 1:1 mapped due to the extent not consuming the entire storage volume: 

VPlexcli:/> show-use-hierarchy -t /clusters/cluster-1/virtual-volumes/device_Symm1000_003B_1_vol
storage-view: VPLEX_STORAGE_VIEW (cluster-1)
  virtual-volume: device_Symm1000_00AB_1_vol (2T, local @ cluster-1, running, expandable by 2M)
    local-device: device_Symm1000_00AB_1 (2T, raid-0, cluster-1)
      extent: extent_Symm1000_00AB_1 (2T)
        storage-volume: Symm1000_00AB (2T)
          logical-unit: VPD83T3:60000970000196801000533000000111
            storage-array: EMC-SYMMETRIX-196801000


In this case, follow VPLEX: How to Expand a virtual volume to expand the virtual-volume's underlying components and the virtual-volume itself to utilise it's full capacity.

Betroffene Produkte

AppSync

Produkte

AppSync, VPLEX Series