Hi Qu

A known bug when qgroup is enabled.
Fixed in v4.10-rcs.

Please mount using v4.10 kernels and it will mount without problem.

I have rebootet with the v4.10 kernel and everything works again!
Thank you very much, you save me a lot of work!

Regards Patrick
--
Patrick Schmid  [off-list ref]     support: +41 44 633 2668
IT Services Group, HPT H 8                voice:   +41 44 633 3997
Departement Physik, ETH Zurich
CH-8093 Zurich, Switzerland