I have a 3 host storage cluster with 10 osd on each host. the other day 5 drives on a single host went down and the other 5 failed to come up after reboot.

In my attempts to understand the cause of the issue I realize that I need some guidance to diagnose the problem.

I have tried ceph-disk activate-all and get the following errors:

[root@faraday ~]# ceph-disk activate-all
mount_activate: Failed to activate
ceph-disk: Error: No cluster conf found in /etc/ceph with fsid e1d7b4ae-2dcd-40ee-bea5-d103fe1fa9c9
mount_activate: Failed to activate
ceph-disk: Error: No cluster conf found in /etc/ceph with fsid e1d7b4ae-2dcd-40ee-bea5-d103fe1fa9c9
mount_activate: Failed to activate
ceph-disk: Error: No cluster conf found in /etc/ceph with fsid e1d7b4ae-2dcd-40ee-bea5-d103fe1fa9c9
mount_activate: Failed to activate
ceph-disk: Error: No cluster conf found in /etc/ceph with fsid e1d7b4ae-2dcd-40ee-bea5-d103fe1fa9c9
mount_activate: Failed to activate
ceph-disk: Error: No cluster conf found in /etc/ceph with fsid e1d7b4ae-2dcd-40ee-bea5-d103fe1fa9c9
mount_activate: Failed to activate
ceph-disk: Error: No cluster conf found in /etc/ceph with fsid e1d7b4ae-2dcd-40ee-bea5-d103fe1fa9c9
mount_activate: Failed to activate
ceph-disk: Error: No cluster conf found in /etc/ceph with fsid e1d7b4ae-2dcd-40ee-bea5-d103fe1fa9c9
mount_activate: Failed to activate
ceph-disk: Error: No cluster conf found in /etc/ceph with fsid e1d7b4ae-2dcd-40ee-bea5-d103fe1fa9c9
mount_activate: Failed to activate
ceph-disk: Error: No cluster conf found in /etc/ceph with fsid e1d7b4ae-2dcd-40ee-bea5-d103fe1fa9c9
mount_activate: Failed to activate
ceph-disk: Error: No cluster conf found in /etc/ceph with fsid e1d7b4ae-2dcd-40ee-bea5-d103fe1fa9c9
ceph-disk: Error: One or more partitions failed to activate

any ideas what would cause this?

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