diff --git a/system_setup/install.sh b/system_setup/install.sh
index bc95dd3..3615166 100755
--- a/system_setup/install.sh
+++ b/system_setup/install.sh
@@ -377,14 +377,15 @@ if [[ "$MODE" == "shrink" ]]; then
     fi
 
     info "Shrinking partition $S_PNUM to ${NEW_END} MiB in partition table..."
-    parted -s "$S_DISK" resizepart "$S_PNUM" "${NEW_END}MiB" \
+    # Use printf instead of -s so parted's "partition is busy" confirmation is answered Yes
+    printf 'Yes\n' | parted "$S_DISK" resizepart "$S_PNUM" "${NEW_END}MiB" \
         || die "parted resizepart failed."
 fi
 
 # ── Create OEMDRV partition ───────────────────────────────────────────────────
 
 info "Creating new OEMDRV partition (${OEMDRV_START}–${OEMDRV_END} MiB) on $WORK_DISK..."
-parted -s "$WORK_DISK" mkpart primary btrfs "${OEMDRV_START}MiB" "${OEMDRV_END}MiB" \
+printf 'Yes\n' | parted "$WORK_DISK" mkpart primary btrfs "${OEMDRV_START}MiB" "${OEMDRV_END}MiB" \
     || die "parted mkpart failed. Check that the target area is free space on $WORK_DISK."
 
 partprobe "$WORK_DISK"