anchor.diff:              #{
                   type => loopdevice,
                   host => OpHost1,
  -                size => 1 * 1024 * 1024 * 1024,
  +                size => ?LOOPDEVICE_SIZE,
                   uuid => ?OSD_UUID1 % UUID is always sent by user or filled in rest_ceph
               }
           ]
  
positive.code:                 host => OpHost3,
                  type => loopdevice,
                  path => ?CUSTOM_LOOP_PATH,
                  size => 2 * 1024 * 1024 * 1024,
                  uuid => ?OSD_UUID2
              }
          ]
  
negative.code: -define(CUSTOM_LOOP_PATH, <<"/volumes/persistence/ceph-loopdevices/custompath.loop">>).
  % path of loopdevice file used to test blockdevice type deployment
  -define(MOCK_BLOCKDEVICE_PATH, <<"/volumes/persistence/ceph-loopdevices/blockdevice.loop">>).
  -define(LOOPDEVICE_SIZE, 300 * 1024 * 1024).
  
  -define(POOL_PARAMS, #{
      type => <<"localceph">>,
  