Hi, 2 disk is required at least. https://docs.starlingx.io/deploy_install_guides/current/bare_metal_aio_simpl... Best Regards Shuicheng From: Ezpeer Chen [mailto:ezpeerchen@gmail.com] Sent: Monday, September 9, 2019 2:39 PM To: starlingx-discuss@lists.starlingx.io Subject: [Starlingx-discuss] Storage configuration Issue for STX R2.0 Dear all, AIO Simplex: https://docs.starlingx.io/deploy_install_guides/current/bare_metal_aio_simpl... Add an OSD on controller-0 for ceph: system host-disk-list controller-0 system host-disk-list controller-0 | awk '/\/dev\/sdb/{print $2}' | xargs -i system host-stor-add controller-0 {} system host-stor-list controller-0 There's only one hard disk so there's no /dev/sdb. How to configure it? Thanks a lot.