disc: add debug logging for error type

Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "libfreemkv"
-version = "0.13.29"
+version = "0.13.30"
 edition = "2024"
 rust-version = "1.86"
 license = "AGPL-3.0-only"

src/disc/mod.rs

@@ -1417,7 +1417,12 @@ impl Disc {
                 } else if block_result
                     .as_ref()
                     .err()
-                    .map(|e| e.scsi_sense().map(|s| s.is_medium_error()).unwrap_or(false))
+                    .map(|e| {
+                        let sense = e.scsi_sense();
+                        let is_medium = sense.map(|s| s.is_medium_error()).unwrap_or(false);
+                        tracing::warn!(target: "freemkv::disc", "block error {:?} sense={:?} is_medium={}", e, sense, is_medium);
+                        is_medium
+                    })
                     .unwrap_or(false)
                 {
                     // 0.13.28: MEDIUM ERROR (bad sector) — skip this sector
@@ -1508,12 +1513,14 @@ impl Disc {
                         // 60 sectors either — bail with full sense info
                         // rather than chewing through bpt=1 timeouts.
                         if let Err(ref e) = one_result {
-                            if e.scsi_sense().map(|s| s.is_medium_error()).unwrap_or(false) {
+                            let is_medium = e.scsi_sense().map(|s| s.is_medium_error()).unwrap_or(false);
+                            if is_medium {
                                 // 0.13.28: MEDIUM ERROR in single mode — skip sector
-                                tracing::trace!(
+                                tracing::warn!(
                                     target: "freemkv::disc",
                                     phase = "skip_bad_sector",
                                     lba = s_lba,
+                                    error = %e,
                                     "MEDIUM ERROR in single mode; skipping"
                                 );
                                 let zero = vec![0u8; one_bytes];