Replacing the node by using the root and Ceph OSD disks from the failed node

Use the root and Ceph OSD disks from the failed node to replace the node.

1. Disable backfilling.

   ceph osd set noout
   ceph osd set noscrub
   ceph osd set nodeep-scrub

   For example,

   [ceph: root@host01 /]# ceph osd set noout
   [ceph: root@host01 /]# ceph osd set noscrub
   [ceph: root@host01 /]# ceph osd set nodeep-scrub

2. Replace the node, taking the disks from the old node, and adding them to the new node.
3. Enable backfilling.

   ceph osd unset noout
   ceph osd unset noscrub
   ceph osd unset nodeep-scrub

   For example,

   [ceph: root@host01 /]# ceph osd unset noout
   [ceph: root@host01 /]# ceph osd unset noscrub
   [ceph: root@host01 /]# ceph osd unset nodeep-scrub