diff --git a/Drivers/BSP/GD5F2GQ5UE/nand_ftl.c b/Drivers/BSP/GD5F2GQ5UE/nand_ftl.c
index e89a37fd..6a2fa097 100644
--- a/Drivers/BSP/GD5F2GQ5UE/nand_ftl.c
+++ b/Drivers/BSP/GD5F2GQ5UE/nand_ftl.c
@@ -105,8 +105,14 @@ static int ftl_read_page(dhara_sector_t lpn) {
     s_cached_lpn = lpn;
     s_cache_dirty = 0;
     if (s_tree_probe_log) {
-        DBG_INFO("ftl read LPN=%lu (binding see nand read lines)",
-                 (unsigned long)lpn);
+        /* 内容指纹：前 8 字节（BPB=33 52 / FAT32=F8 FF.. / 擦除=FF FF..）
+         * 半新半旧混合页在此直接现形 */
+        DBG_INFO("ftl t %lu read LPN=%lu: %02X %02X %02X %02X %02X %02X %02X %02X",
+                 (unsigned long)HAL_GetTick(), (unsigned long)lpn,
+                 (unsigned int)s_cache_buf[0], (unsigned int)s_cache_buf[1],
+                 (unsigned int)s_cache_buf[2], (unsigned int)s_cache_buf[3],
+                 (unsigned int)s_cache_buf[4], (unsigned int)s_cache_buf[5],
+                 (unsigned int)s_cache_buf[6], (unsigned int)s_cache_buf[7]);
     }
     return GD5F_OK;
 }
diff --git a/Src/freertos.c b/Src/freertos.c
index f918c2fb..c0c371a1 100644
--- a/Src/freertos.c
+++ b/Src/freertos.c
@@ -226,8 +226,10 @@ void StartDefaultTask(void *argument)
    * （/config.ini 丢失 → 配置引擎首启路径回落工厂默认并自动重建模板）——
    * 仅当卷已不可用时触发，可用设备 > 一份配置文件。 */
   static FATFS default_fatfs;
+  nand_ftl_set_tree_probe(1);   /* 诊断窗口：挂载+探针的读路径全记录 */
   FRESULT fr = f_mount(&default_fatfs, "", 1);
   if (fr == FR_NO_FILESYSTEM) {
+      nand_ftl_set_tree_probe(0);   /* mkfs 路径不追踪（I/O 洪泛） */
       DBG_INFO("[FS] no FAT volume, formatting NAND...");
       static uint8_t fs_work[FF_MAX_SS];
       MKFS_PARM opts = { FM_FAT32, 0, 0, 0, 0 };