diff --git a/operator_setup.sh b/operator_setup.sh
index 5649d22..708ba8e 100755
--- a/operator_setup.sh
+++ b/operator_setup.sh
@@ -453,12 +453,25 @@ step "Running partprobe..."
 partprobe "/dev/${DEVICE}" || warn "partprobe failed (non-critical)"
 sleep 3
 
-step "Mounting to ${MOUNT_POINT}..."
+step "Mounting rootfs to ${MOUNT_POINT}..."
 mkdir -p "$MOUNT_POINT"
-# Try /dev/${DEVICE}1 (most common for single-partition images)
-mount "/dev/${DEVICE}1" "$MOUNT_POINT" 2>/dev/null || mount "/dev/${DEVICE}p1" "$MOUNT_POINT" || error "Mount failed. Check device partitioning."
+# Armbian images: p1=FAT32 boot, p2=ext4 rootfs. Mount the rootfs partition.
+# Detect by filesystem type; fall back to p1 for single-partition images.
+_ROOTFS_PART=""
+for _try in "/dev/${DEVICE}2" "/dev/${DEVICE}p2"; do
+    if [[ -b "$_try" ]] && blkid "$_try" 2>/dev/null | grep -qi ext; then
+        _ROOTFS_PART="$_try"
+        break
+    fi
+done
+if [[ -n "$_ROOTFS_PART" ]]; then
+    mount "$_ROOTFS_PART" "$MOUNT_POINT" || error "Mount of rootfs (${_ROOTFS_PART}) failed"
+else
+    # Single-partition image fallback
+    mount "/dev/${DEVICE}1" "$MOUNT_POINT" 2>/dev/null || mount "/dev/${DEVICE}p1" "$MOUNT_POINT" || error "Mount failed — could not locate ext4 rootfs partition"
+fi
 
-info "Mounted at ${MOUNT_POINT}"
+info "Mounted at ${MOUNT_POINT} ($(blkid -o value -s TYPE "${_ROOTFS_PART:-/dev/${DEVICE}1}"))"
 
 # ══════════════════════════════════════════════════════════════════════════════
 # 7. APPLY CONFIGURATION TO CARD