diff --git a/roles/1-prep/tasks/install-expand-rootfs.yml b/roles/1-prep/tasks/install-expand-rootfs.yml
index 54d77c55b..b5296e5c1 100644
--- a/roles/1-prep/tasks/install-expand-rootfs.yml
+++ b/roles/1-prep/tasks/install-expand-rootfs.yml
@@ -2,7 +2,7 @@
   package:
     name:
       - parted               # 2022-03-15: RasPiOS and Ubuntu install this regardless -- so rarely nec, but just in case.
-      - cloud-guest-utils    # 2022-03-15: For growpart command -- though RasPiOS currently doesn't need this, as raspi-config's do_expand_rootfs() instead uses fdisk.  Ubuntu pre-installs cloud-guest-utils, for use with cloud-init.
+      - cloud-guest-utils    # 2022-04-02: For growpart command -- whereas RasPiOS's 'raspi-config --expand-rootfs' instead uses fdisk (requiring a reboot, see do_expand_rootfs() in https://github.com/RPi-Distro/raspi-config/blob/master/raspi-config).  FYI Ubuntu pre-installs cloud-guest-utils, for use with cloud-init.
     state: present
 
 - name: "Install from templates: /usr/sbin/iiab-expand-rootfs, /etc/systemd/system/iiab-expand-rootfs.service"