>> Migrating DB volume using ceph-bluestore-tool was a wrong step.


What's the alternative?  Redeploying an entire cluster of spinners doesn't seem 
very feasible.


>> It doesn't setup LV tags for underlying volumes which prevents preper OSD 
>> devices detection after reboot.
>> 
>> One should set these tags manually using lvchange --addtag command. To a 
>> major degree DB tags are similar to ones for the block device. But some 
>> additional tuning is still required.
>> 
>> Unfortunately AFAIK there is no full how-to-do manual available. One of 
>> Eugene's link covers the topic just partly. So you should rather use 
>> existing valid OSD deployment as a reference.

Seems like justification for a tracker bug.

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