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
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