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    convert existing CEPH cluster to Proxmox?

    Wouldn't this be a matter of having the same configuration files between the Proxmox/Ceph Hosts and the pure Ceph cluster? I am too, looking for a way to get some hosts dedicated purely to Ceph and not be Hyperconverged.
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    ceph never actually achieves desired redundancy

    I think your Ceph cluster is working as intended. If you have the default replica = 3, when only two nodes are running, your cluster is in an unhealthy state until the third node comes back. This still allowes you to write data to the cluster, to the best of my knowledge, until only one server...
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    New SSID not showing up during installation

    Maybe the drive is not empty? Try issuing: fdisk /dev/sdX d (for delete the partition, even if none exists) w (to write back to the disk) Then you should see the disk in your Proxmox gui. I had to do something similar to used disks that I got out of ebay that had some data on them.
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    Growing the Ceph and Proxmox clusters

    We've deployed a cluster of 4 nodes with Proxmox and Ceph, with both SSD and HDD devices. The cluster is performing as expected and we are happy with the configuration, but want to make the recovery a bit more robust in case of a major failure. We are also finding out that 3 PVE nodes should be...