There is no way to know the current size consumed by each of the tiers, be it hot or cold. It would be really helpful for the admin to know the following: 1)total size of the volume 2)total size of each tier of the volume 3)total consumed storage space of each tier 4)total available/free storage space of each tier
*** Bug 1273801 has been marked as a duplicate of this bug. ***
Thank you for your bug report. We are no longer working on any improvements for Tier. This bug will be set to CLOSED WONTFIX to reflect this. Please reopen if the rfe is deemed critical.