When issuing the long listing command on VPlex distributed device context, the DD details are not listed in the CLI wherein the DD is healthy and in running state. Even the GUI doesn't reflect the DD details.

CLI output: 

VPlexcli:/distributed-storage/distributed-devices> ll
VPlexcli:/distributed-storage/distributed-devices>

GUI Output:

 
On checking the show-use-hierarchy in CLI and by directly entering the DD name context the DD info is listed. Similarly, in GUI view-map, the DD details are displayed.

CLI output : 

show-use-hierarchy --targets /clusters/cluster-1/virtual-volumes/dev_test_claim_vol
virtual-volume: dev_test_claim_vol (1G, distributed @ cluster-1, unexported)
  distributed-device: dev_test_claim (1G, raid-1)
    distributed-device-component: dev_test_claim2017Feb16_141533 (1G, raid-0, cluster-1)
      extent: extent_test_claim_1 (1G)
        storage-volume: test_claim (1G)
          logical-unit: VPD83T3:6006016013302700bcf5c222512fe611
            storage-array: EMC-CLARiiON-APMxxxxxxxxxxx
    distributed-device-component: dm_test_1 (1G, raid-0, cluster-2)
      extent: extent_CLARiiON1782_LUN_00036_1 (1G)
        storage-volume: CLARiiON1782_LUN_00036 (1G)
          logical-unit: VPD83T3:6006016013302700be111d339b08e611
            storage-array: EMC-CLARiiON-APMxxxxxxxxxxx


VPlexcli:/distributed-storage/distributed-devices/dev_test_claim> ll

Attributes:
Name                    Value
----------------------  ----------------------
application-consistent  false
auto-resume             true
block-count             262144
block-size              4K
capacity                1G
clusters-involved       [cluster-1, cluster-2]
geometry                raid-1
health-indications      []
health-state            ok
locality                distributed
operational-status      ok
rebuild-allowed         true
rebuild-eta             -
rebuild-progress        -
rebuild-status          done
rebuild-type            full
rule-set-name           cluster-1-detaches
service-status          running
stripe-depth            -
system-id               dev_test_claim
thin-capable            false
transfer-size           128K
virtual-volume          dev_test_claim_vol


Contexts:
Name                           Description
-----------------------------  ------------------------------------------------
at-cluster                     Contains cluster-specific information on the
                               enclosing distributed-device.
distributed-device-components  Contains information about one cluster-local leg
                               of the enclosing distributed-device.
 

GUI output:

Code bug in VPlex Geosynchrony 

The issue with listing DD is encountered from VPlex GeoSynchrony 6.0 version.

In 6.0 version, the listing of the distributed device in VPlex will fail when the number of distributed devices are not more than one.

If the number of DD is just one, there will be issues in listing the DD in both GUI and CLI. If the DD count is more than one, there won't be any issues with listing the DD's.Hence the workaround is to create DD more than one and check the DD details.

This issue is addressed in the VPlex GeoSynchrony 6.0 service pack1 patch 1.