Hi,

is it possible to use just a partition instead of a whole disk for OSD? On a server I already use hdb for Ceph and want to add hda4 to be used in the Ceph Cluster, but it didn’t work for me.

On the server with the partition I tried:

ceph-disk prepare /dev/sda4

and

ceph-disk activate /dev/sda4

And with df I see, that ceph did something on the partition:

/dev/sda4       1.8T  2.8G  1.8T   1% /var/lib/ceph/osd/ceph-4


My problem is, that after I activated the disk, I didn't see a change in the ceph status output:

  data:
    pools:   6 pools, 168 pgs
    objects: 25.84 k objects, 100 GiB
    usage:   305 GiB used, 6.8 TiB / 7.1 TiB avail
    pgs:     168 active+clean

Can some one help me?
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