Hi,

I have a 7 nodes cluster deployed using cephadm with a mixt of HDD, SSD and
NVME

I would like to reconfigure some of the HDD OSDs and put their DB on NVME
There are only 6 x18 TB OSDs and there is a dedicate , "empty" 1.6 TB NVME
installed for this purpose

The cluster is configured as EC 4+2 and  is not under heavy use

I would appreciate if you could advise what is the best way of achieving
that

As far as I was able to find, there are these 2 options

1. remove and redeploy OSDs
2. use ceph-volume

Option 1 is pretty straight forward but more time consuming

For Option2 though I was not able to find any clear instructions

The first thing I stumbled one was  how to use ceph-volume in a
cephadm managed cluster on a host that does not have it

( "cephadm shell --host HOSTNAME -- ceph-volume ls"
is complaining about "unrecognized arguments --host")

Any help,links,suggestions will be greatly appreciated

Steven
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