diff --git a/Documentation/ceph-filesystem-crd.md b/Documentation/ceph-filesystem-crd.md
index 4b2b533cc05d2..863c94a739e03 100644
--- a/Documentation/ceph-filesystem-crd.md
+++ b/Documentation/ceph-filesystem-crd.md
@@ -86,6 +86,8 @@ spec:
     replicated:
       size: 3
   dataPools:
+    - replicated:
+        size: 3
     - erasureCoded:
         dataChunks: 2
         codingChunks: 1
@@ -94,6 +96,16 @@ spec:
     activeStandby: true
 ```
 
+**IMPORTANT**: For erasure coded pools, we have to create a replicated pool as the primary pool and erasureCoded as the secondary pool.
+Separately, a directory layout property needs to be added to use the secondary EC data pool.
+
+```console
+mkdir /mnt/cephfs/myssddir
+$ setfattr -n ceph.dir.layout.pool -v <ec-pool-name> /mnt/cephfs/myssddir #example ec-pool-name, myfs-ec
+```
+
+See [CephFS file layouts](https://docs.ceph.com/en/latest/cephfs/file-layouts/#adding-a-data-pool-to-the-file-system) for more details.
+
 (These definitions can also be found in the [`filesystem-ec.yaml`](https://github.com/rook/rook/blob/{{ branchName }}/cluster/examples/kubernetes/ceph/filesystem-ec.yaml) file.
 Also see an example in the [`storageclass-ec.yaml`](https://github.com/rook/rook/blob/{{ branchName }}/cluster/examples/kubernetes/ceph/csi/cephfs/storageclass-ec.yaml) for how to configure the volume.)