Depending on the actual Ceph version you can either use ceph-volume lvm activate --all on the reinstalled host, if it's not managed by cephadm yet. Or if it is you can run this: ceph cephadm osd activate <host>... The latter is an example from the ceph docs [1]. Regards, Eugen [1] https://docs.ceph.com/en/latest/cephadm/osd/#activate-existing-osds Zitat von ceph@elchaka.de:

As far as i know you have just to install your os and ceph.

Your osd disks will automaticaly detected.

Hth Mehmet

Am 24. April 2021 07:14:08 MESZ schrieb For 99 <foroughi.forough@gmail.com>:

...

Hi every body. I have ceph cluster. One of OSD host os on sd card that have 6 osd hdd is crashed, so I need to change sd card. how can I reconnect 6 osd hard disks to new os without destroy the data?

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