Sorry, not much to say other than a "me too". i spent a week testing ceph configurations.. it should have only been 2 days. but a huge amount of my time was wasted because I needed to do a full reboot on the hardware. on a related note: sometimes "zap" didnt fully clean things up. I had to manually go in and clean up vgs. or pvs. or sometimes wipefs -a so, in theory, this could be a linux LVM bug. but if I recall, i was doing this with ceph octopus, and centos 7.9 ----- Original Message ----- From: "Tony Liu" <tonyliu0592@hotmail.com> To: "ceph-users" <ceph-users@ceph.io> Sent: Sunday, February 7, 2021 5:31:53 PM Subject: [ceph-users] Re: Device is not available after zap I checked pvscan, vgscan, lvscan and "ceph-volume lvm list" on the OSD node, that zapped device doesn't show anywhere. Anything missing? Thanks! Tony ________________________________________ From: Tony Liu <tonyliu0592@hotmail.com> Sent: February 7, 2021 05:27 PM To: ceph-users Subject: [ceph-users] Device is not available after zap Hi, With v15.2.8, after zap a device on OSD node, it's still not available. The reason is "locked, LVM detected". If I reboot the whole OSD node, then the device will be available. There must be something no being cleaned up. Any clues? Thanks! Tony