ceph-volume partial failure with multiple OSDs per device

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I provision OSDs with the following command:
```
ceph-volume --log-path /tmp/ceph-log lvm batch --prepare --bluestore --yes
--dmcrypt --osds-per-device 2 /dev/nvme0n1 --crush-device-class nvme
```

What I have observed is that sometimes ceph-volume will provision the first
OSD successfully, but then it will fail to provision the second OSD. When
this happens ceph-volume does not attempt to clean up the first OSD which
was created.

My question is what should be done in this scenario?

Can I re-run the ceph-volume command and it is smart enough to see the
first OSD is already provisioned and then create the missing second OSD?
Or should I zap and purge the OSD which was created and then re-run the
ceph-volume command?

Elias
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