Hi, I want to create a new OSD on a 4TB Samsung MZ1L23T8HBLA-00A07 enterprise nvme device. Creating the OSD works but it cannot be initialized and therefore not started. In the log I see an entry about a failed assert. ./src/os/bluestore/fastbmap_allocator_impl.cc: 405: FAILED ceph_assert((aligned_extent.length % l0_granularity) == 0) Is this the culprit? In addition at the end of the logfile there is a failed mount and a failed osd init mentioned. 2023-09-11T16:30:04.708+0200 7f99aa28f3c0 -1 bluefs _check_allocations OP_FILE_UPDATE_INC invalid extent 1: 0x140000~10000: duplicate reference, ino 30 2023-09-11T16:30:04.708+0200 7f99aa28f3c0 -1 bluefs mount failed to replay log: (14) Bad address 2023-09-11T16:30:04.708+0200 7f99aa28f3c0 20 bluefs _stop_alloc 2023-09-11T16:30:04.708+0200 7f99aa28f3c0 -1 bluestore(/var/lib/ceph/osd/ceph-43) _open_bluefs failed bluefs mount: (14) Bad address 2023-09-11T16:30:04.708+0200 7f99aa28f3c0 10 bluefs maybe_verify_layout no memorized_layout in bluefs superblock 2023-09-11T16:30:04.708+0200 7f99aa28f3c0 -1 bluestore(/var/lib/ceph/osd/ceph-43) _open_db failed to prepare db environment: 2023-09-11T16:30:04.708+0200 7f99aa28f3c0 1 bdev(0x5565c261fc00 /var/lib/ceph/osd/ceph-43/block) close 2023-09-11T16:30:04.940+0200 7f99aa28f3c0 -1 osd.43 0 OSD:init: unable to mount object store 2023-09-11T16:30:04.940+0200 7f99aa28f3c0 -1 ** ERROR: osd init failed: (5) Input/output error -- Regards, ppa. Martin Konold -- Martin Konold - Prokurist, CTO KONSEC GmbH -⁠ make things real Amtsgericht Stuttgart, HRB 23690 Geschäftsführer: Andreas Mack Im Köller 3, 70794 Filderstadt, Germany