diff --git a/crates/e2e_test/src/cluster_multidrive_pool_test.rs b/crates/e2e_test/src/cluster_multidrive_pool_test.rs
index 3f88e5af4..22b456ffa 100644
--- a/crates/e2e_test/src/cluster_multidrive_pool_test.rs
+++ b/crates/e2e_test/src/cluster_multidrive_pool_test.rs
@@ -76,6 +76,28 @@ async fn cluster_multidrive_single_pool_smoke() -> TestResult {
     Ok(())
 }
 
+/// 4 nodes x 4 drives, single pool: exercise the maximum local erasure layout
+/// supported by the cluster harness. This remains in the nightly lane because
+/// it starts four real server processes and sixteen data directories.
+#[tokio::test]
+async fn cluster_four_node_four_drive_single_pool_smoke() -> TestResult {
+    crate::common::init_logging();
+
+    let mut cluster = RustFSTestClusterEnvironment::with_topology(ClusterTopology::single_pool_multidrive(4, 4)).await?;
+
+    let volumes = cluster.rustfs_volumes_arg();
+    assert_eq!(volumes.split(' ').count(), 16, "expected 16 explicit endpoints, got: {volumes}");
+    assert!(!volumes.contains('{'), "single-pool layout must not use ellipses: {volumes}");
+    assert!(cluster.nodes.iter().all(|node| node.data_dirs.len() == 4));
+
+    cluster.start().await?;
+    cluster.create_test_bucket(BUCKET).await?;
+
+    let payload = vec![0x3Cu8; 1024 * 1024];
+    put_get_roundtrip(&cluster, "multidrive-4/object", &payload).await?;
+    Ok(())
+}
+
 /// Two single-node pools, 2 drives each: the multi-pool layout boots and
 /// round-trips. Every pool is a distinct erasure pool (`pool_idx` 0 and 1).
 #[tokio::test]
diff --git a/docs/testing/e2e-suite-inventory.md b/docs/testing/e2e-suite-inventory.md
index c8412b236..eef3ea1c7 100644
--- a/docs/testing/e2e-suite-inventory.md
+++ b/docs/testing/e2e-suite-inventory.md
@@ -30,7 +30,7 @@
 | chaos | 2 |  |
 | checksum_upload_test | 7 |  |
 | cluster_concurrency_test | 3 | 🌙 |
-| cluster_multidrive_pool_test | 2 | 🌙 |
+| cluster_multidrive_pool_test | 3 | 🌙 |
 | common | 17 |  |
 | compression_test | 6 | ✅ |
 | connection_cap_test | 2 |  |
@@ -103,4 +103,4 @@
 | tls_hot_reload_test | 1 | ✅ |
 | version_id_regression_test | 10 | ✅ |
 
-**Total listed: 619 tests across 86 modules · PR smoke: 165 tests / 36 modules · merge/main full: 495 tests / 77 modules · nightly replication: 56 tests · nightly cluster faults: 29 tests / 7 modules · nightly protocols: 16 tests** · updated 2026-08-26.
+**Total listed: 620 tests across 86 modules · PR smoke: 165 tests / 36 modules · merge/main full: 495 tests / 77 modules · nightly replication: 56 tests · nightly cluster faults: 30 tests / 7 modules · nightly protocols: 16 tests** · updated 2026-08-31.