Hey, in case it would be helpfui, I've added hfs support to the kvm-xfstests/gce-xfstests[1] test appliance. Following the instructions at [2], you can now run "kvm-xfstests -c hfs -g auto" to run all of the tests in the auto group. If you want to replicate the failure in generic/001, you could run "kvm-fstests -c hfs generic/001". [1] http://thunk.org/gce-xfstests [2] https://github.com/tytso/xfstests-bld/blob/master/Documentation/kvm-quickstart.md Your IBM colleages Ritesh Harjani and Ojaswin Mujoo use this framework for testing ext4, and have contributed towards this test framework. So if you have any questions, you could reach out to them. I'm quite willing to help as well, of course! - Ted