v0.11.9: fast verify reads — 5s timeout, no recovery loop

src/drive/mod.rs

@@ -542,6 +542,32 @@ impl Drive {
         Err(Error::DiscRead { sector: lba as u64 })
     }
 
+    /// Fast single-attempt read for verification — no recovery, short timeout.
+    /// Returns Ok on success, Err on any failure. Does not retry.
+    pub fn read_fast(&mut self, lba: u32, count: u16, buf: &mut [u8]) -> Result<usize> {
+        let cdb = [
+            crate::scsi::SCSI_READ_10,
+            0x00,
+            (lba >> 24) as u8,
+            (lba >> 16) as u8,
+            (lba >> 8) as u8,
+            lba as u8,
+            0x00,
+            (count >> 8) as u8,
+            count as u8,
+            0x00,
+        ];
+        match self.scsi.as_mut().execute(
+            &cdb,
+            crate::scsi::DataDirection::FromDevice,
+            buf,
+            5_000, // 5 second timeout — enough for healthy reads, fast fail for bad sectors
+        ) {
+            Ok(result) => Ok(result.bytes_transferred),
+            Err(_) => Err(Error::DiscRead { sector: lba as u64 }),
+        }
+    }
+
     /// Read the disc capacity in sectors (2048 bytes each).
     pub fn read_capacity(&mut self) -> Result<u32> {
         let cdb = [
@@ -643,6 +669,10 @@ impl SectorReader for Drive {
     fn read_sectors(&mut self, lba: u32, count: u16, buf: &mut [u8]) -> Result<usize> {
         self.read(lba, count, buf)
     }
+
+    fn read_sectors_fast(&mut self, lba: u32, count: u16, buf: &mut [u8]) -> Result<usize> {
+        self.read_fast(lba, count, buf)
+    }
 }
 
 /// Find all optical drives connected to this system.