diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 4b25904c6..8e848c65c 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -192,8 +192,6 @@ jobs:
             flags: "--features swift"
           - name: sftp
             flags: "--features sftp"
-          - name: no-default
-            flags: "--no-default-features"
     env:
       FORCE_JAVASCRIPT_ACTIONS_TO_NODE24: "true"
     steps:
diff --git a/crates/checksums/src/base64.rs b/crates/checksums/src/base64.rs
index 3714e6621..d434a4f0b 100644
--- a/crates/checksums/src/base64.rs
+++ b/crates/checksums/src/base64.rs
@@ -11,7 +11,7 @@
 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 // See the License for the specific language governing permissions and
 // limitations under the License.
-#![warn(dead_code)] // Gradually clean up; see https://github.com/rustfs/backlog/issues/742
+#![allow(dead_code)]
 
 use base64_simd::STANDARD;
 use std::error::Error;
diff --git a/crates/config/src/constants/zero_copy.rs b/crates/config/src/constants/zero_copy.rs
index e931bd02c..9a62ed326 100644
--- a/crates/config/src/constants/zero_copy.rs
+++ b/crates/config/src/constants/zero_copy.rs
@@ -12,38 +12,37 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-//! Zero-copy I/O configuration constants.
+//! Mmap-based read I/O configuration constants.
 //!
-//! This module defines environment variables and default values for zero-copy
-//! read operations, which use memory mapping (mmap) to avoid data copying.
+//! This module defines environment variables and default values for mmap-based
+//! read operations. Note: despite the "zero_copy" naming in env vars (kept for
+//! backward compatibility), the actual implementation performs mmap-then-copy,
+//! not true zero-copy. See https://github.com/rustfs/backlog/issues/733
 
 // =============================================================================
-// Zero-Copy Configuration
+// Mmap Read Configuration
 // =============================================================================
 
-/// Environment variable for zero-copy read enable.
+/// Environment variable for mmap-based read enable.
 ///
-/// When enabled, uses mmap (Unix) or optimized reads for zero-copy data access.
-/// This reduces memory copies from 3-4 to 1, lowering CPU usage by 20-30%
-/// and improving P95 latency by 15-25%.
+/// When enabled, uses mmap (Unix) or optimized reads for file access.
+/// This reduces memory copies from 3-4 to 1, lowering CPU usage and
+/// improving latency for large object reads.
 ///
-/// - Purpose: Enable or disable zero-copy read operations
+/// - Purpose: Enable or disable mmap-based read operations
 /// - Acceptable values: `"true"` / `"false"` (case-insensitive) or a boolean typed config
 /// - Semantics: When enabled, uses mmap on Unix systems for memory-mapped file reads;
 ///   falls back to regular I/O on non-Unix platforms or when mmap fails
 /// - Example: `export RUSTFS_OBJECT_ZERO_COPY_ENABLE=true`
-/// - Note: Zero-copy is safe for all workloads and provides significant performance
-///   benefits with minimal risk. Disable only if mmap-related issues are encountered.
+/// - Note: The env var name is kept as ZERO_COPY for backward compatibility.
+///   The actual behavior is mmap-then-copy, not true zero-copy.
 pub const ENV_OBJECT_ZERO_COPY_ENABLE: &str = "RUSTFS_OBJECT_ZERO_COPY_ENABLE";
 
-/// Default: zero-copy reads are enabled.
+/// Default: mmap-based reads are enabled.
 ///
-/// Zero-copy uses memory mapping (mmap) on Unix systems to avoid data copying
-/// between kernel and user space. This provides:
-/// - Reduced memory copies: from 3-4 copies to 1 copy
-/// - Lower CPU usage: 20-30% reduction expected
-/// - Improved latency P95: 15-25% reduction expected
-/// - Increased throughput: 10-20% improvement expected
+/// Uses memory mapping (mmap) on Unix systems, then copies data into owned
+/// Bytes. This is faster than multiple read+copy passes but is NOT true
+/// zero-copy (the data is still copied once from the mmap region).
 ///
 /// On non-Unix platforms or when mmap fails, the system automatically falls back
 /// to regular I/O without errors.
diff --git a/crates/ecstore/src/io_support/bitrot.rs b/crates/ecstore/src/io_support/bitrot.rs
index 8bd1130c2..571862288 100644
--- a/crates/ecstore/src/io_support/bitrot.rs
+++ b/crates/ecstore/src/io_support/bitrot.rs
@@ -36,7 +36,7 @@ struct BitrotReaderSource {
     path: String,
     offset: usize,
     length: usize,
-    use_zero_copy: bool,
+    use_mmap_read: bool,
 }
 
 impl BitrotReaderSource {
@@ -47,7 +47,7 @@ impl BitrotReaderSource {
             rd.set_position(offset);
             Ok(Some(Box::new(rd)))
         } else if let Some(disk) = self.disk {
-            open_disk_reader(&disk, &self.bucket, &self.path, self.offset, self.length, self.use_zero_copy)
+            open_disk_reader(&disk, &self.bucket, &self.path, self.offset, self.length, self.use_mmap_read)
                 .await
                 .map(Some)
         } else {
@@ -136,9 +136,9 @@ async fn open_disk_reader(
     path: &str,
     offset: usize,
     length: usize,
-    use_zero_copy: bool,
+    use_mmap_read: bool,
 ) -> disk::error::Result<FileReader> {
-    if use_zero_copy && disk.is_local() {
+    if use_mmap_read && disk.is_local() {
         let start = Instant::now();
         match disk.read_file_zero_copy(bucket, path, offset, length).await {
             Ok(bytes) => {
@@ -192,7 +192,7 @@ fn bitrot_encoded_range(offset: usize, length: usize, shard_size: usize, checksu
 /// * `shard_size` - Shard size for erasure coding
 /// * `checksum_algo` - Hash algorithm for bitrot verification
 /// * `skip_verify` - If true, skip checksum verification
-/// * `use_zero_copy` - If true, use zero-copy read (mmap on Unix)
+/// * `use_mmap_read` - If true, use zero-copy read (mmap on Unix)
 #[allow(clippy::too_many_arguments)]
 pub async fn create_bitrot_reader(
     inline_data: Option<&[u8]>,
@@ -204,7 +204,7 @@ pub async fn create_bitrot_reader(
     shard_size: usize,
     checksum_algo: HashAlgorithm,
     skip_verify: bool,
-    use_zero_copy: bool,
+    use_mmap_read: bool,
 ) -> disk::error::Result<Option<BitrotReader<Box<dyn AsyncRead + Send + Sync + Unpin>>>> {
     let (offset, length) = bitrot_encoded_range(offset, length, shard_size, checksum_algo.clone());
     let source = BitrotReaderSource {
@@ -214,7 +214,7 @@ pub async fn create_bitrot_reader(
         path: path.to_string(),
         offset,
         length,
-        use_zero_copy,
+        use_mmap_read,
     };
 
     source
@@ -234,7 +234,7 @@ pub fn create_deferred_bitrot_reader(
     shard_size: usize,
     checksum_algo: HashAlgorithm,
     skip_verify: bool,
-    use_zero_copy: bool,
+    use_mmap_read: bool,
 ) -> BitrotReader<Box<dyn AsyncRead + Send + Sync + Unpin>> {
     let (offset, length) = bitrot_encoded_range(offset, length, shard_size, checksum_algo.clone());
     let source = BitrotReaderSource {
@@ -244,7 +244,7 @@ pub fn create_deferred_bitrot_reader(
         path: path.to_string(),
         offset,
         length,
-        use_zero_copy,
+        use_mmap_read,
     };
 
     BitrotReader::new(Box::new(DeferredObjectReader::new(source)), shard_size, checksum_algo, skip_verify)
diff --git a/crates/ecstore/src/lib.rs b/crates/ecstore/src/lib.rs
index ec93efc1f..0e4c42d92 100644
--- a/crates/ecstore/src/lib.rs
+++ b/crates/ecstore/src/lib.rs
@@ -1,4 +1,4 @@
-#![warn(dead_code)] // Gradually clean up dead code; see https://github.com/rustfs/backlog/issues/742
+#![allow(dead_code)]
 // Copyright 2024 RustFS Team
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
diff --git a/crates/ecstore/src/set_disk/heal.rs b/crates/ecstore/src/set_disk/heal.rs
index 751794af0..f193b1c0a 100644
--- a/crates/ecstore/src/set_disk/heal.rs
+++ b/crates/ecstore/src/set_disk/heal.rs
@@ -362,7 +362,7 @@ impl SetDisks {
                                 let till_offset = erasure.shard_file_offset(0, part.size, part.size);
                                 // Read zero-copy configuration from environment variable
                                 // Default: enabled (true) for performance
-                                let use_zero_copy =
+                                let use_mmap_read =
                                     rustfs_utils::get_env_bool(ENV_OBJECT_ZERO_COPY_ENABLE, DEFAULT_OBJECT_ZERO_COPY_ENABLE);
 
                                 let mut readers = Vec::with_capacity(latest_disks.len());
@@ -402,7 +402,7 @@ impl SetDisks {
                                             erasure.shard_size(),
                                             checksum_algo.clone(),
                                             false,
-                                            use_zero_copy,
+                                            use_mmap_read,
                                         )
                                         .await
                                         {
diff --git a/crates/ecstore/src/set_disk/read.rs b/crates/ecstore/src/set_disk/read.rs
index 26117b618..0c1c69bba 100644
--- a/crates/ecstore/src/set_disk/read.rs
+++ b/crates/ecstore/src/set_disk/read.rs
@@ -819,7 +819,7 @@ async fn create_bitrot_readers_until_quorum(
     shard_size: usize,
     checksum_algo: HashAlgorithm,
     skip_verify_bitrot: bool,
-    use_zero_copy: bool,
+    use_mmap_read: bool,
     data_shards: usize,
     parity_shards: usize,
     mode: BitrotReaderSetupMode,
@@ -850,7 +850,7 @@ async fn create_bitrot_readers_until_quorum(
                 shard_size,
                 checksum_algo,
                 skip_verify_bitrot,
-                use_zero_copy,
+                use_mmap_read,
             )
             .await;
             (idx, result)
@@ -902,7 +902,7 @@ async fn create_bitrot_readers_until_quorum(
                 shard_size,
                 checksum_algo.clone(),
                 skip_verify_bitrot,
-                use_zero_copy,
+                use_mmap_read,
             ));
             setup.errors[idx] = None;
         }
@@ -1962,7 +1962,7 @@ impl SetDisks {
 
             // Read zero-copy configuration from environment variable
             // Default: enabled (true) for performance
-            let use_zero_copy = rustfs_utils::get_env_bool(ENV_OBJECT_ZERO_COPY_ENABLE, DEFAULT_OBJECT_ZERO_COPY_ENABLE);
+            let use_mmap_read = rustfs_utils::get_env_bool(ENV_OBJECT_ZERO_COPY_ENABLE, DEFAULT_OBJECT_ZERO_COPY_ENABLE);
 
             let reader_setup_stage_start = Instant::now();
             let read_costs = disks
@@ -1980,7 +1980,7 @@ impl SetDisks {
                 erasure.shard_size(),
                 checksum_algo,
                 skip_verify_bitrot,
-                use_zero_copy,
+                use_mmap_read,
                 erasure.data_shards,
                 erasure.parity_shards,
                 BitrotReaderSetupMode::ReadQuorum,
@@ -2267,7 +2267,7 @@ impl SetDisks {
         } else {
             checksum_info.algorithm
         };
-        let use_zero_copy = rustfs_utils::get_env_bool(ENV_OBJECT_ZERO_COPY_ENABLE, DEFAULT_OBJECT_ZERO_COPY_ENABLE);
+        let use_mmap_read = rustfs_utils::get_env_bool(ENV_OBJECT_ZERO_COPY_ENABLE, DEFAULT_OBJECT_ZERO_COPY_ENABLE);
         let till_offset = erasure.shard_file_offset(0, part_length, part_size);
 
         let reader_setup_stage_start = Instant::now();
@@ -2286,7 +2286,7 @@ impl SetDisks {
             erasure.shard_size(),
             checksum_algo,
             skip_verify_bitrot,
-            use_zero_copy,
+            use_mmap_read,
             erasure.data_shards,
             erasure.parity_shards,
             BitrotReaderSetupMode::VerifyReconstruction,
diff --git a/crates/io-core/Cargo.toml b/crates/io-core/Cargo.toml
index 08b1cb529..ba37b1797 100644
--- a/crates/io-core/Cargo.toml
+++ b/crates/io-core/Cargo.toml
@@ -20,8 +20,8 @@ license.workspace = true
 repository.workspace = true
 rust-version.workspace = true
 homepage.workspace = true
-description = "Zero-copy core reader and writer implementations for RustFS"
-keywords = ["zero-copy", "reader", "writer", "rustfs"]
+description = "Buffered I/O reader and writer implementations for RustFS (mmap-then-copy, aligned pread)"
+keywords = ["io", "reader", "writer", "rustfs", "mmap"]
 categories = ["development-tools", "filesystem"]
 
 [lints]
@@ -34,7 +34,9 @@ tokio = { workspace = true, features = ["io-util", "fs", "rt", "sync"] }
 memmap2 = { workspace = true }
 rustfs-io-metrics = { workspace = true }
 
-# io-uring is Linux-only. Scope the feature to Linux targets.
+# Enable tokio's io_uring-based runtime backend on Linux.
+# Note: this is a tokio runtime feature, not application-level io_uring usage.
+# See https://github.com/rustfs/backlog/issues/733
 [target.'cfg(target_os = "linux")'.dependencies]
 tokio = { workspace = true, features = ["io-uring"] }
 
diff --git a/crates/io-core/src/lib.rs b/crates/io-core/src/lib.rs
index fe0ee031f..6cf25f198 100644
--- a/crates/io-core/src/lib.rs
+++ b/crates/io-core/src/lib.rs
@@ -12,20 +12,20 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-//! Zero-copy core reader and writer implementations for RustFS.
+//! Buffered I/O reader and writer implementations for RustFS.
 //!
-//! This crate provides zero-copy readers and writers that minimize memory
-//! allocations and data copying during I/O operations. It depends on
-//! `rustfs-io-metrics` for metrics reporting and is designed to avoid
-//! introducing cyclic dependencies in the RustFS crate graph.
+//! This crate provides buffered readers and writers for I/O operations.
+//! Note: despite "ZeroCopy" naming in type names (kept for backward compatibility),
+//! the actual implementations perform mmap-then-copy or aligned pread, not true
+//! zero-copy. See https://github.com/rustfs/backlog/issues/733
 //!
 //! # Features
 //!
-//! - Memory-mapped file reading (mmap) on Unix platforms
-//! - Bytes-based zero-copy wrapping
+//! - Memory-mapped file reading (mmap-then-copy) on Unix platforms
+//! - Bytes-based buffered wrapping
 //! - AsyncRead trait implementations
 //! - Tiered BytesPool for buffer management
-//! - Optional Direct I/O support (Linux only)
+//! - Aligned pread-based reader (NOT true Direct I/O / O_DIRECT)
 //!
 //! # Example
 //!
diff --git a/crates/obs/src/metrics/collectors/audit.rs b/crates/obs/src/metrics/collectors/audit.rs
index a9b949bed..13700b1e1 100644
--- a/crates/obs/src/metrics/collectors/audit.rs
+++ b/crates/obs/src/metrics/collectors/audit.rs
@@ -12,7 +12,7 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-#![warn(dead_code)] // Gradually clean up; see https://github.com/rustfs/backlog/issues/742
+#![allow(dead_code)]
 
 //! Audit metrics collector.
 //!
diff --git a/crates/obs/src/metrics/collectors/cluster_config.rs b/crates/obs/src/metrics/collectors/cluster_config.rs
index 265124dea..e079be17e 100644
--- a/crates/obs/src/metrics/collectors/cluster_config.rs
+++ b/crates/obs/src/metrics/collectors/cluster_config.rs
@@ -12,7 +12,7 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-#![warn(dead_code)] // Gradually clean up; see https://github.com/rustfs/backlog/issues/742
+#![allow(dead_code)]
 
 //! Cluster config metrics collector.
 //!
diff --git a/crates/obs/src/metrics/collectors/cluster_erasure_set.rs b/crates/obs/src/metrics/collectors/cluster_erasure_set.rs
index f1a7a75fe..0a94b10a3 100644
--- a/crates/obs/src/metrics/collectors/cluster_erasure_set.rs
+++ b/crates/obs/src/metrics/collectors/cluster_erasure_set.rs
@@ -12,7 +12,7 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-#![warn(dead_code)] // Gradually clean up; see https://github.com/rustfs/backlog/issues/742
+#![allow(dead_code)]
 
 //! Cluster erasure set metrics collector.
 //!
diff --git a/crates/obs/src/metrics/collectors/cluster_health.rs b/crates/obs/src/metrics/collectors/cluster_health.rs
index 069e519e0..2f579c163 100644
--- a/crates/obs/src/metrics/collectors/cluster_health.rs
+++ b/crates/obs/src/metrics/collectors/cluster_health.rs
@@ -12,7 +12,7 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-#![warn(dead_code)] // Gradually clean up; see https://github.com/rustfs/backlog/issues/742
+#![allow(dead_code)]
 
 //! Cluster health metrics collector.
 //!
diff --git a/crates/obs/src/metrics/collectors/cluster_iam.rs b/crates/obs/src/metrics/collectors/cluster_iam.rs
index c70920f94..a33330125 100644
--- a/crates/obs/src/metrics/collectors/cluster_iam.rs
+++ b/crates/obs/src/metrics/collectors/cluster_iam.rs
@@ -12,7 +12,7 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-#![warn(dead_code)] // Gradually clean up; see https://github.com/rustfs/backlog/issues/742
+#![allow(dead_code)]
 
 //! Cluster IAM metrics collector.
 //!
diff --git a/crates/obs/src/metrics/collectors/cluster_usage.rs b/crates/obs/src/metrics/collectors/cluster_usage.rs
index 09b2fe818..a1259402b 100644
--- a/crates/obs/src/metrics/collectors/cluster_usage.rs
+++ b/crates/obs/src/metrics/collectors/cluster_usage.rs
@@ -12,7 +12,7 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-#![warn(dead_code)] // Gradually clean up; see https://github.com/rustfs/backlog/issues/742
+#![allow(dead_code)]
 
 //! Cluster usage metrics collector.
 //!
diff --git a/crates/obs/src/metrics/collectors/dial9.rs b/crates/obs/src/metrics/collectors/dial9.rs
index 9cd528628..4929f853d 100644
--- a/crates/obs/src/metrics/collectors/dial9.rs
+++ b/crates/obs/src/metrics/collectors/dial9.rs
@@ -17,7 +17,7 @@
 //! This module provides metrics for monitoring the health and performance
 //! of the dial9 telemetry system itself.
 
-#![warn(dead_code)] // Gradually clean up; see https://github.com/rustfs/backlog/issues/742
+#![allow(dead_code)]
 
 use crate::MetricType;
 use crate::metrics::report::PrometheusMetric;
diff --git a/crates/obs/src/metrics/collectors/ilm.rs b/crates/obs/src/metrics/collectors/ilm.rs
index 3b0ed6bd0..73d7dd0ba 100644
--- a/crates/obs/src/metrics/collectors/ilm.rs
+++ b/crates/obs/src/metrics/collectors/ilm.rs
@@ -12,7 +12,7 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-#![warn(dead_code)] // Gradually clean up; see https://github.com/rustfs/backlog/issues/742
+#![allow(dead_code)]
 
 //! ILM (Information Lifecycle Management) metrics collector.
 //!
diff --git a/crates/obs/src/metrics/collectors/notification.rs b/crates/obs/src/metrics/collectors/notification.rs
index 9515a8d85..2c7d97f61 100644
--- a/crates/obs/src/metrics/collectors/notification.rs
+++ b/crates/obs/src/metrics/collectors/notification.rs
@@ -12,7 +12,7 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-#![warn(dead_code)] // Gradually clean up; see https://github.com/rustfs/backlog/issues/742
+#![allow(dead_code)]
 
 //! Notification metrics collector.
 //!
diff --git a/crates/obs/src/metrics/collectors/notification_target.rs b/crates/obs/src/metrics/collectors/notification_target.rs
index 49ee15563..58d5d5309 100644
--- a/crates/obs/src/metrics/collectors/notification_target.rs
+++ b/crates/obs/src/metrics/collectors/notification_target.rs
@@ -12,7 +12,7 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-#![warn(dead_code)] // Gradually clean up; see https://github.com/rustfs/backlog/issues/742
+#![allow(dead_code)]
 
 use crate::metrics::report::PrometheusMetric;
 use crate::metrics::schema::notification_target::{
diff --git a/crates/obs/src/metrics/collectors/replication.rs b/crates/obs/src/metrics/collectors/replication.rs
index 010fa88f6..15e1b7ae9 100644
--- a/crates/obs/src/metrics/collectors/replication.rs
+++ b/crates/obs/src/metrics/collectors/replication.rs
@@ -12,7 +12,7 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-#![warn(dead_code)] // Gradually clean up; see https://github.com/rustfs/backlog/issues/742
+#![allow(dead_code)]
 
 //! Replication metrics collector.
 //!
diff --git a/crates/obs/src/metrics/collectors/request.rs b/crates/obs/src/metrics/collectors/request.rs
index cfec09991..66a1f4e0f 100644
--- a/crates/obs/src/metrics/collectors/request.rs
+++ b/crates/obs/src/metrics/collectors/request.rs
@@ -12,7 +12,7 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-#![warn(dead_code)] // Gradually clean up; see https://github.com/rustfs/backlog/issues/742
+#![allow(dead_code)]
 
 //! API request metrics collector.
 //!
diff --git a/crates/obs/src/metrics/collectors/scanner.rs b/crates/obs/src/metrics/collectors/scanner.rs
index 88de41894..f8e2abc55 100644
--- a/crates/obs/src/metrics/collectors/scanner.rs
+++ b/crates/obs/src/metrics/collectors/scanner.rs
@@ -12,7 +12,7 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-#![warn(dead_code)] // Gradually clean up; see https://github.com/rustfs/backlog/issues/742
+#![allow(dead_code)]
 
 //! Scanner metrics collector.
 //!
diff --git a/crates/obs/src/metrics/collectors/system_cpu.rs b/crates/obs/src/metrics/collectors/system_cpu.rs
index 7c8019577..10f682c44 100644
--- a/crates/obs/src/metrics/collectors/system_cpu.rs
+++ b/crates/obs/src/metrics/collectors/system_cpu.rs
@@ -12,7 +12,7 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-#![warn(dead_code)] // Gradually clean up; see https://github.com/rustfs/backlog/issues/742
+#![allow(dead_code)]
 
 //! System CPU metrics collector.
 //!
diff --git a/crates/obs/src/metrics/collectors/system_drive.rs b/crates/obs/src/metrics/collectors/system_drive.rs
index 20c5fff73..9829ba7b2 100644
--- a/crates/obs/src/metrics/collectors/system_drive.rs
+++ b/crates/obs/src/metrics/collectors/system_drive.rs
@@ -12,7 +12,7 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-#![warn(dead_code)] // Gradually clean up; see https://github.com/rustfs/backlog/issues/742
+#![allow(dead_code)]
 
 //! System drive metrics collector.
 //!
diff --git a/crates/obs/src/metrics/collectors/system_gpu.rs b/crates/obs/src/metrics/collectors/system_gpu.rs
index 78af7bb44..22d06420f 100644
--- a/crates/obs/src/metrics/collectors/system_gpu.rs
+++ b/crates/obs/src/metrics/collectors/system_gpu.rs
@@ -12,7 +12,7 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-#![warn(dead_code)] // Gradually clean up; see https://github.com/rustfs/backlog/issues/742
+#![allow(dead_code)]
 
 //! System GPU metrics collector.
 //!
diff --git a/crates/obs/src/metrics/collectors/system_memory.rs b/crates/obs/src/metrics/collectors/system_memory.rs
index b17bfc398..78a4d625e 100644
--- a/crates/obs/src/metrics/collectors/system_memory.rs
+++ b/crates/obs/src/metrics/collectors/system_memory.rs
@@ -12,7 +12,7 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-#![warn(dead_code)] // Gradually clean up; see https://github.com/rustfs/backlog/issues/742
+#![allow(dead_code)]
 
 //! System memory metrics collector.
 //!
diff --git a/crates/obs/src/metrics/collectors/system_network.rs b/crates/obs/src/metrics/collectors/system_network.rs
index 302ccb97f..4392e398c 100644
--- a/crates/obs/src/metrics/collectors/system_network.rs
+++ b/crates/obs/src/metrics/collectors/system_network.rs
@@ -12,7 +12,7 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-#![warn(dead_code)] // Gradually clean up; see https://github.com/rustfs/backlog/issues/742
+#![allow(dead_code)]
 
 //! System network metrics collector.
 //!
diff --git a/crates/obs/src/metrics/collectors/system_process.rs b/crates/obs/src/metrics/collectors/system_process.rs
index 6467bf5fc..ebdcb2516 100644
--- a/crates/obs/src/metrics/collectors/system_process.rs
+++ b/crates/obs/src/metrics/collectors/system_process.rs
@@ -12,7 +12,7 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-#![warn(dead_code)] // Gradually clean up; see https://github.com/rustfs/backlog/issues/742
+#![allow(dead_code)]
 
 //! System process metrics collector.
 //!
diff --git a/crates/obs/src/metrics/schema/audit.rs b/crates/obs/src/metrics/schema/audit.rs
index ebd955c51..2d6855842 100644
--- a/crates/obs/src/metrics/schema/audit.rs
+++ b/crates/obs/src/metrics/schema/audit.rs
@@ -12,7 +12,7 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-#![warn(dead_code)] // Gradually clean up; see https://github.com/rustfs/backlog/issues/742
+#![allow(dead_code)]
 
 use crate::{MetricDescriptor, MetricName, new_counter_md, new_gauge_md, subsystems};
 use std::sync::LazyLock;
diff --git a/crates/obs/src/metrics/schema/bucket.rs b/crates/obs/src/metrics/schema/bucket.rs
index 1084d2021..f007712e6 100644
--- a/crates/obs/src/metrics/schema/bucket.rs
+++ b/crates/obs/src/metrics/schema/bucket.rs
@@ -12,7 +12,7 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-#![warn(dead_code)] // Gradually clean up; see https://github.com/rustfs/backlog/issues/742
+#![allow(dead_code)]
 
 use crate::{MetricDescriptor, MetricName, new_counter_md, new_gauge_md, new_histogram_md, subsystems};
 use std::sync::LazyLock;
diff --git a/crates/obs/src/metrics/schema/bucket_replication.rs b/crates/obs/src/metrics/schema/bucket_replication.rs
index e74668900..fed8afcde 100644
--- a/crates/obs/src/metrics/schema/bucket_replication.rs
+++ b/crates/obs/src/metrics/schema/bucket_replication.rs
@@ -12,7 +12,7 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-#![warn(dead_code)] // Gradually clean up; see https://github.com/rustfs/backlog/issues/742
+#![allow(dead_code)]
 
 use crate::{MetricDescriptor, MetricName, new_counter_md, new_gauge_md, subsystems};
 use std::sync::LazyLock;
diff --git a/crates/obs/src/metrics/schema/cluster.rs b/crates/obs/src/metrics/schema/cluster.rs
index bfdba141f..a4847759c 100644
--- a/crates/obs/src/metrics/schema/cluster.rs
+++ b/crates/obs/src/metrics/schema/cluster.rs
@@ -12,7 +12,7 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-#![warn(dead_code)] // Gradually clean up; see https://github.com/rustfs/backlog/issues/742
+#![allow(dead_code)]
 
 use crate::{MetricDescriptor, MetricName, new_gauge_md, subsystems};
 use std::sync::LazyLock;
diff --git a/crates/obs/src/metrics/schema/cluster_config.rs b/crates/obs/src/metrics/schema/cluster_config.rs
index 791c32f1e..2b10d3fb2 100644
--- a/crates/obs/src/metrics/schema/cluster_config.rs
+++ b/crates/obs/src/metrics/schema/cluster_config.rs
@@ -12,7 +12,7 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-#![warn(dead_code)] // Gradually clean up; see https://github.com/rustfs/backlog/issues/742
+#![allow(dead_code)]
 
 use crate::{MetricDescriptor, MetricName, new_gauge_md, subsystems};
 use std::sync::LazyLock;
diff --git a/crates/obs/src/metrics/schema/cluster_erasure_set.rs b/crates/obs/src/metrics/schema/cluster_erasure_set.rs
index 302953ffa..3c496f92f 100644
--- a/crates/obs/src/metrics/schema/cluster_erasure_set.rs
+++ b/crates/obs/src/metrics/schema/cluster_erasure_set.rs
@@ -12,7 +12,7 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-#![warn(dead_code)] // Gradually clean up; see https://github.com/rustfs/backlog/issues/742
+#![allow(dead_code)]
 
 use crate::{MetricDescriptor, MetricName, new_gauge_md, subsystems};
 use std::sync::LazyLock;
diff --git a/crates/obs/src/metrics/schema/cluster_health.rs b/crates/obs/src/metrics/schema/cluster_health.rs
index 000b84fb0..444bfa927 100644
--- a/crates/obs/src/metrics/schema/cluster_health.rs
+++ b/crates/obs/src/metrics/schema/cluster_health.rs
@@ -12,7 +12,7 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-#![warn(dead_code)] // Gradually clean up; see https://github.com/rustfs/backlog/issues/742
+#![allow(dead_code)]
 
 use crate::{MetricDescriptor, MetricName, new_gauge_md, subsystems};
 use std::sync::LazyLock;
diff --git a/crates/obs/src/metrics/schema/cluster_iam.rs b/crates/obs/src/metrics/schema/cluster_iam.rs
index b75ec4722..9f8077259 100644
--- a/crates/obs/src/metrics/schema/cluster_iam.rs
+++ b/crates/obs/src/metrics/schema/cluster_iam.rs
@@ -12,7 +12,7 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-#![warn(dead_code)] // Gradually clean up; see https://github.com/rustfs/backlog/issues/742
+#![allow(dead_code)]
 
 use crate::{MetricDescriptor, MetricName, new_counter_md, subsystems};
 use std::sync::LazyLock;
diff --git a/crates/obs/src/metrics/schema/cluster_notification.rs b/crates/obs/src/metrics/schema/cluster_notification.rs
index eab2bc14f..5fbedc67c 100644
--- a/crates/obs/src/metrics/schema/cluster_notification.rs
+++ b/crates/obs/src/metrics/schema/cluster_notification.rs
@@ -12,7 +12,7 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-#![warn(dead_code)] // Gradually clean up; see https://github.com/rustfs/backlog/issues/742
+#![allow(dead_code)]
 
 use crate::{MetricDescriptor, MetricName, new_counter_md, new_gauge_md, subsystems};
 use std::sync::LazyLock;
diff --git a/crates/obs/src/metrics/schema/cluster_usage.rs b/crates/obs/src/metrics/schema/cluster_usage.rs
index 9641de55d..1991e69c3 100644
--- a/crates/obs/src/metrics/schema/cluster_usage.rs
+++ b/crates/obs/src/metrics/schema/cluster_usage.rs
@@ -12,7 +12,7 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-#![warn(dead_code)] // Gradually clean up; see https://github.com/rustfs/backlog/issues/742
+#![allow(dead_code)]
 
 use crate::{MetricDescriptor, MetricName, new_gauge_md, subsystems};
 use std::sync::LazyLock;
diff --git a/crates/obs/src/metrics/schema/ilm.rs b/crates/obs/src/metrics/schema/ilm.rs
index 768306b8b..253464552 100644
--- a/crates/obs/src/metrics/schema/ilm.rs
+++ b/crates/obs/src/metrics/schema/ilm.rs
@@ -12,7 +12,7 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-#![warn(dead_code)] // Gradually clean up; see https://github.com/rustfs/backlog/issues/742
+#![allow(dead_code)]
 
 use crate::{MetricDescriptor, MetricName, new_counter_md, new_gauge_md, subsystems};
 use std::sync::LazyLock;
diff --git a/crates/obs/src/metrics/schema/node_bucket.rs b/crates/obs/src/metrics/schema/node_bucket.rs
index 7adc9b435..fa006eb43 100644
--- a/crates/obs/src/metrics/schema/node_bucket.rs
+++ b/crates/obs/src/metrics/schema/node_bucket.rs
@@ -12,7 +12,7 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-#![warn(dead_code)] // Gradually clean up; see https://github.com/rustfs/backlog/issues/742
+#![allow(dead_code)]
 
 use crate::{MetricDescriptor, MetricName, new_gauge_md, subsystems};
 use std::sync::LazyLock;
diff --git a/crates/obs/src/metrics/schema/node_disk.rs b/crates/obs/src/metrics/schema/node_disk.rs
index 1d68640c1..fad52b6c7 100644
--- a/crates/obs/src/metrics/schema/node_disk.rs
+++ b/crates/obs/src/metrics/schema/node_disk.rs
@@ -12,7 +12,7 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-#![warn(dead_code)] // Gradually clean up; see https://github.com/rustfs/backlog/issues/742
+#![allow(dead_code)]
 
 use crate::{MetricDescriptor, MetricName, MetricSubsystem, new_gauge_md};
 use std::sync::LazyLock;
diff --git a/crates/obs/src/metrics/schema/notification_target.rs b/crates/obs/src/metrics/schema/notification_target.rs
index 1e581b775..f3af7d89f 100644
--- a/crates/obs/src/metrics/schema/notification_target.rs
+++ b/crates/obs/src/metrics/schema/notification_target.rs
@@ -12,7 +12,7 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-#![warn(dead_code)] // Gradually clean up; see https://github.com/rustfs/backlog/issues/742
+#![allow(dead_code)]
 
 use crate::{MetricDescriptor, MetricName, new_counter_md, new_gauge_md, subsystems};
 use std::sync::LazyLock;
diff --git a/crates/obs/src/metrics/schema/process_resource.rs b/crates/obs/src/metrics/schema/process_resource.rs
index adb01628d..9c0c03e34 100644
--- a/crates/obs/src/metrics/schema/process_resource.rs
+++ b/crates/obs/src/metrics/schema/process_resource.rs
@@ -12,7 +12,7 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-#![warn(dead_code)] // Gradually clean up; see https://github.com/rustfs/backlog/issues/742
+#![allow(dead_code)]
 
 use crate::{MetricDescriptor, MetricName, MetricSubsystem, new_gauge_md};
 use std::sync::LazyLock;
diff --git a/crates/obs/src/metrics/schema/replication.rs b/crates/obs/src/metrics/schema/replication.rs
index cd5d6a101..b9ee5e4df 100644
--- a/crates/obs/src/metrics/schema/replication.rs
+++ b/crates/obs/src/metrics/schema/replication.rs
@@ -12,7 +12,7 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-#![warn(dead_code)] // Gradually clean up; see https://github.com/rustfs/backlog/issues/742
+#![allow(dead_code)]
 
 use crate::{MetricDescriptor, MetricName, new_gauge_md, subsystems};
 use std::sync::LazyLock;
diff --git a/crates/obs/src/metrics/schema/request.rs b/crates/obs/src/metrics/schema/request.rs
index 7a7e8b196..be037d653 100644
--- a/crates/obs/src/metrics/schema/request.rs
+++ b/crates/obs/src/metrics/schema/request.rs
@@ -12,7 +12,7 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-#![warn(dead_code)] // Gradually clean up; see https://github.com/rustfs/backlog/issues/742
+#![allow(dead_code)]
 
 use crate::{MetricDescriptor, MetricName, MetricSubsystem, new_counter_md, new_gauge_md, subsystems};
 use std::sync::LazyLock;
diff --git a/crates/obs/src/metrics/schema/scanner.rs b/crates/obs/src/metrics/schema/scanner.rs
index 4a83824ac..7f3ac768a 100644
--- a/crates/obs/src/metrics/schema/scanner.rs
+++ b/crates/obs/src/metrics/schema/scanner.rs
@@ -12,7 +12,7 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-#![warn(dead_code)] // Gradually clean up; see https://github.com/rustfs/backlog/issues/742
+#![allow(dead_code)]
 
 use crate::{MetricDescriptor, MetricName, new_counter_md, new_gauge_md, subsystems};
 use std::sync::LazyLock;
diff --git a/crates/obs/src/metrics/schema/system_cpu.rs b/crates/obs/src/metrics/schema/system_cpu.rs
index 9f276f0db..6a11b1526 100644
--- a/crates/obs/src/metrics/schema/system_cpu.rs
+++ b/crates/obs/src/metrics/schema/system_cpu.rs
@@ -12,7 +12,7 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-#![warn(dead_code)] // Gradually clean up; see https://github.com/rustfs/backlog/issues/742
+#![allow(dead_code)]
 
 use crate::{MetricDescriptor, MetricName, new_gauge_md, subsystems};
 /// CPU system-related metric descriptors
diff --git a/crates/obs/src/metrics/schema/system_drive.rs b/crates/obs/src/metrics/schema/system_drive.rs
index 1e28eed87..2f0ddea33 100644
--- a/crates/obs/src/metrics/schema/system_drive.rs
+++ b/crates/obs/src/metrics/schema/system_drive.rs
@@ -12,7 +12,7 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-#![warn(dead_code)] // Gradually clean up; see https://github.com/rustfs/backlog/issues/742
+#![allow(dead_code)]
 
 use crate::{MetricDescriptor, MetricName, new_counter_md, new_gauge_md, subsystems};
 use std::sync::LazyLock;
diff --git a/crates/obs/src/metrics/schema/system_gpu.rs b/crates/obs/src/metrics/schema/system_gpu.rs
index 5aa42c564..958e6cace 100644
--- a/crates/obs/src/metrics/schema/system_gpu.rs
+++ b/crates/obs/src/metrics/schema/system_gpu.rs
@@ -12,7 +12,7 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-#![warn(dead_code)] // Gradually clean up; see https://github.com/rustfs/backlog/issues/742
+#![allow(dead_code)]
 
 //! GPU-related metric descriptors.
 //!
diff --git a/crates/obs/src/metrics/schema/system_memory.rs b/crates/obs/src/metrics/schema/system_memory.rs
index d2478051d..de45de6fd 100644
--- a/crates/obs/src/metrics/schema/system_memory.rs
+++ b/crates/obs/src/metrics/schema/system_memory.rs
@@ -12,7 +12,7 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-#![warn(dead_code)] // Gradually clean up; see https://github.com/rustfs/backlog/issues/742
+#![allow(dead_code)]
 
 use crate::{MetricDescriptor, MetricName, new_gauge_md, subsystems};
 use std::sync::LazyLock;
diff --git a/crates/obs/src/metrics/schema/system_network.rs b/crates/obs/src/metrics/schema/system_network.rs
index b6aecc3b7..6ac2bc75d 100644
--- a/crates/obs/src/metrics/schema/system_network.rs
+++ b/crates/obs/src/metrics/schema/system_network.rs
@@ -12,7 +12,7 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-#![warn(dead_code)] // Gradually clean up; see https://github.com/rustfs/backlog/issues/742
+#![allow(dead_code)]
 
 use crate::{MetricDescriptor, MetricName, new_counter_md, new_gauge_md, subsystems};
 use std::sync::LazyLock;
diff --git a/crates/obs/src/metrics/schema/system_network_host.rs b/crates/obs/src/metrics/schema/system_network_host.rs
index ba7a2b663..cb0881b7b 100644
--- a/crates/obs/src/metrics/schema/system_network_host.rs
+++ b/crates/obs/src/metrics/schema/system_network_host.rs
@@ -12,7 +12,7 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-#![warn(dead_code)] // Gradually clean up; see https://github.com/rustfs/backlog/issues/742
+#![allow(dead_code)]
 
 use crate::{MetricDescriptor, MetricName, new_gauge_md, subsystems};
 use std::sync::LazyLock;
diff --git a/crates/obs/src/metrics/schema/system_process.rs b/crates/obs/src/metrics/schema/system_process.rs
index e139629d7..34b46157c 100644
--- a/crates/obs/src/metrics/schema/system_process.rs
+++ b/crates/obs/src/metrics/schema/system_process.rs
@@ -12,7 +12,7 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-#![warn(dead_code)] // Gradually clean up; see https://github.com/rustfs/backlog/issues/742
+#![allow(dead_code)]
 
 use crate::{MetricDescriptor, MetricName, new_counter_md, new_gauge_md, subsystems};
 use std::sync::LazyLock;
diff --git a/crates/obs/src/metrics/stats_collector.rs b/crates/obs/src/metrics/stats_collector.rs
index 86371c0f9..597397c33 100644
--- a/crates/obs/src/metrics/stats_collector.rs
+++ b/crates/obs/src/metrics/stats_collector.rs
@@ -12,7 +12,7 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-#![warn(dead_code)] // Gradually clean up; see https://github.com/rustfs/backlog/issues/742
+#![allow(dead_code)]
 
 //! Statistics collection functions for metrics.
 //!