How to stop using (unmount) a failed OSD with BlueStore ?

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Hi all, i have to hot-swap a failed osd on a Luminous Cluster with Blue store (the disk is SATA, WAL and DB are on NVME).

I've issued a:
* ceph osd crush reweight osd_id 0
* systemctl stop (osd I'd daemon)
* umount /var/lib/ceph/osd/osd_id
* ceph osd destroy osd_id

everything seems of, but if I left everything as is ( until I wait for the replaced disk ) I can see that dmesg errors on writing on the device are still appearing.

The osd is of course down and out the crushmap.
am I missing something ? like a step to execute or something else ?

hoping to get help.
best.

​alejandrito
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