Adding node to the OCP [IPI BM cluster], via creating BMH & then scaling the machinset, ironic agent is indeed booting the node [Lenovo ThinkSystem SR645] & then once it boots up first time, after a 2-5 mins, ISO gets umounted. Protocol used is redfish here.

Then again as per the principle of kubernetes, BMH will try to boot the node again, same things repeat in the loop.

Below are the logs from the system:

~~~
Oct 31 11:22:00 st-ocp4sandboxworker105 ironic-agent[4092]: warnings.warn(
Oct 31 11:22:00 st-ocp4sandboxworker105 ironic-agent[4092]: 2025-10-31 11:22:00.171 1 WARNING ironic_python_agent.ironic_api_client [-] Ironic has r
esponded with a conflict, signaling the node is locked. We will wait 10 seconds before trying again. Error 409: Node 409b3a96-b53f-4256-b54b-0688593
921d0 is locked by host 10.136.160.100, please retry after the current operation is completed.
Oct 31 11:22:01 st-ocp4sandboxworker105 kernel: usb 1-1.5: USB disconnect, device number 4
Oct 31 11:22:01 st-ocp4sandboxworker105 systemd[1]: Unmounting /run/media/iso...
Oct 31 11:22:01 st-ocp4sandboxworker105 umount[4390]: umount: /run/media/iso: target is busy.
Oct 31 11:22:01 st-ocp4sandboxworker105 systemd[1]: run-media-iso.mount: Mount process exited, code=exited, status=32/n/a
Oct 31 11:22:01 st-ocp4sandboxworker105 systemd[1]: Failed unmounting /run/media/iso.
Oct 31 11:22:01 st-ocp4sandboxworker105 systemd[1]: Unmounting /run/media/iso...
Oct 31 11:22:01 st-ocp4sandboxworker105 umount[4394]: umount: /run/media/iso: target is busy.
Oct 31 11:22:01 st-ocp4sandboxworker105 systemd[1]: run-media-iso.mount: Mount process exited, code=exited, status=32/n/a
Oct 31 11:22:01 st-ocp4sandboxworker105 systemd[1]: Failed unmounting /run/media/iso.
Oct 31 11:22:01 st-ocp4sandboxworker105 systemd[1]: Unmounting /run/media/iso...
Oct 31 11:22:01 st-ocp4sandboxworker105 systemd[1]: Failed unmounting /run/media/iso.
Oct 31 11:22:01 st-ocp4sandboxworker105 systemd[1]: run-media-iso.mount: Unit needs to be stopped because it is bound to inactive unit dev-sr0.device it, but not stopping since we tried this too often recently.
~~~