Hello Requirements Team, The Cinder team recently became aware of a regression in os-brick that prevents Nova from attaching NVMe volumes [0]. A fix has been merged to master (yoga development) [1] and has been backported to stable/xena [2]. We've proposed a release of os-brick 5.0.1 from stable/xena [3], and are petitioning for an Requirements Freeze Exception to include os-brick 5.0.1 in the xena release. Thank you for your attention to this matter. [0] https://bugs.launchpad.net/os-brick/+bug/1945323 [1] https://review.opendev.org/c/openstack/os-brick/+/811944 [2] https://review.opendev.org/c/openstack/os-brick/+/812010 [3] https://review.opendev.org/c/openstack/releases/+/812048