Why we need to know down OSD
There is no direct command to figure out which OSD went in a Ceph cluster. It is a persistent need in a large Ceph installation since OSD going down is a common event.- The way to find the down OSDs is by taking a look at the primary (leader) monitor log in the cluster.
- In the log, search for 'down' keyword.
Tip
Once you have find the down OSD, the next step is to reahc the node that hosts the OSD.
$ sudo ceph osd find <osd id>
