+++ This bug was initially created as a clone of Bug #1333220 +++

Description of problem:
With a teired volume, a df -h shows a capacity equal to the hot + cold tiers. This is wrong, since the hot tier is a cache layer not an extension of the volumes capacity.

Version-Release number of selected component (if applicable):
tested against 3.7.10

How reproducible:


Steps to Reproduce:
1. create a tiered volume
2. mount it and run df -h 


Actual results:
df -h shows a combined capacity view of hot+cold

Expected results:
df -h should show the capacity of the cold tier, since the cache layer is 'transient'. 

Additional info: