iscsi resize -vmware datastore cannot increase size

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Hi,
I am trying to increase size of a datastore made available through ceph iscsi rbd 
The steps I followed are depicted below
Basically gwcli report correct data and even VMware device capacity is correct but when tried to increase it there is no device listed 

I am using ceph-iscsi-config-2.6-42.gccca57d.el7 and ceph 13.2.2

Any guidance/help will be appreciated 

1. increase rbd size 
rbd -p rbd resize --size 6T rep01
Resizing image: 100% complete...done.

2. restart gwcli
 systemctl restart rbd-target-gw &&  systemctl restart rbd-target-api

3 check size
 gwcli
/iscsi-target...go-ceph/hosts> ls
o- hosts .................................................................................................... [Hosts: 8: Auth: CHAP]
  o- iqn.1998-01.com.vmware:vsan5-66c18541 ................................................ [LOGGED-IN, Auth: CHAP, Disks: 2(12.0T)]
  | o- lun 0 .................................................................................... [rbd.vmware01(6.0T), Owner: osd01]
  | o- lun 1 ....................................................................................... [rbd.rep01(6.0T), Owner: osd02]

4. VMware rescan devices 


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