Hi, Unfortunately, some of our HDDs failed and we need to replace these drives which are parts of "combined" OSDs (DB/WAL on NVME, block storage on HDD). All OSDs are defined with a service definition similar to this one: ``` service_type: osd service_id: ceph02_combined_osd service_name: osd.ceph02_combined_osd placement: hosts: - ceph02 spec: data_devices: paths: - /dev/sda - /dev/sdb - /dev/sdc - /dev/sdd - /dev/sde - /dev/sdf - /dev/sdg - /dev/sdh - /dev/sdi db_devices: paths: - /dev/nvme0n1 - /dev/nvme1n1 filter_logic: AND objectstore: bluestore ``` In the above example, HDDs `sda` and `sdb` are not readable and data cannot be copied over to new HDDs. NVME partitions of `nvme0n1` with DB/WAL data are intact, but I guess that data is useless. I think the best approach is to replace the dead drives and completely rebuild each affected OSD. How should we go about this, preferably in a way that other OSDs on the node remain unaffected and operational? I would appreciate any advice or pointers to the relevant documentation. Best regards, Zakhar