Ceph » RADOS

i have try the new function of replace the osd with new command ,it work, but i have some problem,i don't know if it's a problem

these is my step:
1、stop osd.4

1. systemctl stop ceph-osd@4

2、destroy osd.4

1. ceph osd destroy osd.4 --yes-i-really-mean-it

3、with new osd uuid

1. uuidgen
   4576d84d-7677-42b8-810c-2dc39c589b2a
   and now the osd.4 status is down in ,so no backfill no recovery
   then i run command:
2. ceph osd new 4576d84d-7677-42b8-810c-2dc39c589b2a 4
   and then osd.4 status is down out ,and backfill or recovery begin

4、replace osd.4 with the new uuid above
#ceph-disk prepare --osd-uuid 4576d84d-7677-42b8-810c-2dc39c589b2a /dev/sdf

and all pg active+clean

my problem is:

ceph osd new command may not mark the osd out ,and when the new replce osd add in,just make recovery begin.