diff --git a/cluster/README b/cluster/README
index 39f9190..f5b5970 100644
--- a/cluster/README
+++ b/cluster/README
@@ -34,6 +34,7 @@
 The following storage classes use this cluster:
 
  - `waw-hdd-redundant-1` - erasure coded 2.1
+ - `waw-hdd-yolo-1` - unreplicated (you _will_ lose your data)
  - `waw-hdd-redundant-1-object` - erasure coded 2.1 object store
 
 A dashboard is available at https://ceph-waw1.hswaw.net/, to get the admin password run:
diff --git a/cluster/kube/cluster.jsonnet b/cluster/kube/cluster.jsonnet
index a4d8680..42dd2e3 100644
--- a/cluster/kube/cluster.jsonnet
+++ b/cluster/kube/cluster.jsonnet
@@ -122,6 +122,15 @@
             },
         },
     },
+    // yolo block storage (no replicas!)
+    cephWaw1Yolo: rook.ReplicatedBlockPool(cluster.cephWaw1, "waw-hdd-yolo-1") {
+        spec: {
+            failureDomain: "host",
+            replicated: {
+                size: 1,
+            },
+        },
+    },
     cephWaw1Object: rook.S3ObjectStore(cluster.cephWaw1, "waw-hdd-redundant-1-object") {
         spec: {
             metadataPool: {
diff --git a/cluster/kube/lib/rook.libsonnet b/cluster/kube/lib/rook.libsonnet
index f75e9f0..5223654 100644
--- a/cluster/kube/lib/rook.libsonnet
+++ b/cluster/kube/lib/rook.libsonnet
@@ -469,6 +469,26 @@
         }
     },
 
+    ReplicatedBlockPool(cluster, name):: {
+        local pool = self,
+        spec:: error "spec must be specified",
+
+        pool: kube._Object("ceph.rook.io/v1", "CephBlockPool", name) {
+            metadata+: cluster.metadata,
+            spec: pool.spec,
+        },
+
+        storageClass: kube.StorageClass(name) {
+            provisioner: "ceph.rook.io/block",
+            parameters: {
+                blockPool: pool.pool.metadata.name,
+                clusterNamespace: pool.pool.metadata.namespace,
+                fstype: "ext4",
+            },
+            reclaimPolicy: "Retain",
+        },
+    },
+
     ECBlockPool(cluster, name):: {
         local pool = self,
         spec:: error "spec must be specified",