Red Hat Bugzilla – Bug 977778
[RFE] - Mechanism for converting thin provisioned disks to pre-allocated disks and vice versa
Last modified: 2017-10-03 17:05:11 EDT
any news about this RFE
*** Bug 1059271 has been marked as a duplicate of this bug. ***
Sparsification (coming in 4.0) may help here. Not entirely, since it cannot do it when there are multiple leafs (so it cannot go all down the snap tree).