Merge pull request #45719 from kelbrown20/adding-warning-for-etcd-in-scale

BZ2080277 - Adding warning for RAID config

Author: mburke5678

modules/recommended-configurable-storage-technology.adoc

@@ -120,6 +120,11 @@ Application use cases vary from application to application, as described in the
 
 == Other specific application storage recommendations
 
+[IMPORTANT]
+====
+It is not recommended to use RAID configurations on `Write` intensive workloads, such as `etcd`. If you are running `etcd` with a RAID configuration, you might be at risk of encountering performance issues with your workloads.
+====
+
 * {rh-openstack-first} Cinder: {rh-openstack} Cinder tends to be adept in ROX access mode use cases.
 * Databases: Databases (RDBMSs, NoSQL DBs, etc.) tend to perform best with dedicated block storage.
 * The etcd database must have enough storage and adequate performance capacity to enable a large cluster. Information about monitoring and benchmarking tools to establish ample storage and a high-performance environment is described in _Recommended etcd practices_.