Mastering Proxmox - Third Edition

Forget about hardware RAID

When it comes to Ceph nodes and clusters, we can forget about hardware-based RAID. Instead, we have to think multi-node or clustered RAID. That is because of the distributed nature of Ceph and how data is dispersed in all the drives in the cluster regardless of which node the drive is in. With Ceph, we no longer need to worry about a device failure in a particular node. Ceph performs best when it is given access to each drive directly without any RAID in the middle. If we are to place drives in RAID per node, we will actually hurt Ceph immensely and take away everything that makes Ceph great. We can, however, still use the RAID interface card to implement JBOD configuration or to be able to connect many drives per ...