diff --git a/src/Script_ABC_Blanton/Blanton_Script/bcm_dsc_scan.sh b/src/Script_ABC_Blanton/Blanton_Script/bcm_dsc_scan.sh
index 40fbb30..c9146d7 100644
--- a/src/Script_ABC_Blanton/Blanton_Script/bcm_dsc_scan.sh
+++ b/src/Script_ABC_Blanton/Blanton_Script/bcm_dsc_scan.sh
@@ -12,6 +12,9 @@
 #                        避免灌爆 Tera Term logopen 的 log
 # V1.2.0     20260906    新增 -f 自訂 log 檔名(支援 %u / %t 佔位符)與
 #                        -F 強制覆蓋;預設不覆蓋既有檔案,自動加序號
+# V1.3.0     20260907    修正 bcmcmd 讀取 stdin 導致掃描迴圈在第一筆之後
+#                        提前結束的問題(迴圈改用 fd 3,bcmcmd 導向
+#                        /dev/null);新增實際迭代筆數與清單筆數的檢查
 #
 # Description:
 #   在 Blanton SONiC DUT 上批次執行 Broadcom diag shell 的
@@ -278,16 +281,18 @@ for U in $UNITS; do
     : > "$LOG" || { echo "ERROR: cannot write $LOG" >&2; exit 2; }
     LOGS="$LOGS $LOG"
 
-    printf '### SCAN_BEGIN unit=%s time=%s total=%s script=bcm_dsc_scan_V1.1.0\n' \
+    printf '### SCAN_BEGIN unit=%s time=%s total=%s script=bcm_dsc_scan_V1.3.0\n' \
         "$U" "$(date '+%Y-%m-%d %H:%M:%S')" "$TOTAL" >> "$LOG"
 
     echo "[unit $U] scanning $TOTAL ports -> $LOG" >&2
 
     SEQ=0
-    while IFS=, read -r P SPD; do
+    while IFS=, read -r P SPD <&3; do
         SEQ=$((SEQ + 1))
         printf '### PORT unit=%s port=%s speed=%s seq=%s/%s\n' "$U" "$P" "$SPD" "$SEQ" "$TOTAL" >> "$LOG"
-        bcmcmd -n "$U" -c "dsh -c 'phydiag $P dsc'" >> "$LOG" 2>&1 || RC=1
+        # bcmcmd 會讀取 stdin,若不導成 /dev/null 會把 PORTFILE 剩餘內容吸走,
+        # 導致迴圈在第一筆之後就讀到 EOF 而提前結束。
+        bcmcmd -n "$U" -c "dsh -c 'phydiag $P dsc'" >> "$LOG" 2>&1 < /dev/null || RC=1
 
         if [ "$TTY" -eq 1 ]; then
             printf '\r[unit %s] %s/%s  port=%-5s' "$U" "$SEQ" "$TOTAL" "$P" >&2
@@ -296,19 +301,26 @@ for U in $UNITS; do
         fi
 
         sleep "$DELAY"
-    done < "$PORTFILE"
+    done 3< "$PORTFILE"
 
     [ "$TTY" -eq 1 ] && printf '\n' >&2
     printf '### SCAN_END unit=%s time=%s\n' "$U" "$(date '+%Y-%m-%d %H:%M:%S')" >> "$LOG"
 
-    # 概略檢查:每筆 PORT marker 應對應一個 dsc 區塊
+    # 檢查 1:實際迭代筆數是否等於 port 清單筆數。
+    # 迴圈若因 stdin 被子程序吸走而提前結束,只靠下面的 marker/dump 比對抓不到。
+    if [ "$SEQ" -ne "$TOTAL" ]; then
+        echo "ERROR: unit $U  只跑了 $SEQ/$TOTAL 筆,迴圈提前結束" >&2
+        RC=1
+    fi
+
+    # 檢查 2:每筆 PORT marker 應對應一個 dsc 區塊
     MARK=$(grep -c '^### PORT ' "$LOG" || true)
     DUMP=$(grep -c 'SERDES DISPLAY DIAG DATA END' "$LOG" || true)
     if [ "$MARK" -ne "$DUMP" ]; then
         echo "WARN: unit $U  markers=$MARK  dsc_blocks=$DUMP  (有 port 未取得完整 dump)" >&2
         RC=1
     fi
-    echo "Saved: $LOG  (${DUMP}/${MARK} dumps)" >&2
+    echo "Saved: $LOG  (${DUMP}/${TOTAL} dumps)" >&2
 done
 
 # ----------------------------------------------------------------------------