When deploying a managed cluster with assisted installer using the ZTP workflow, the node fails to reboot when a custom partition is defined in the siteconfig. Parital error message is:

disks: createPartitions: op(2) [failed] 
[...]
Err: exit status 4.

See console screenshot for full error: https://drive.google.com/file/d/1ce_zUZBX5ewSK34jZ4j3BZgr9S403MXU/view?usp=drive_link

hub cluster w/ 
OCP 4.16-rc.2
multicluster-engine.v2.6.0-103
advanced-cluster-management.v2.11.0-86

Installing managed cluster with OCP 4.16 rc.2

    1. Define custom partition in siteconfig. Example here: 
http://registry.kni-qe-0.lab.eng.rdu2.redhat.com:3000/kni-qe/ztp-site-configs/src/workers-4.16/siteconfig/worker-0.yaml#L46
    2. Deploy spoke cluster using ZTP workflow.
    3. Agent Cluster Install stuck on "installing-pending-user-action"
    4. Agent stuck "rebooting"
    5. Spole console shows "cannot mount /sysroot"

 Agent Cluster Install stuck on "installing-pending-user-action"
 Agent stuck "rebooting"
 Spole console shows "cannot mount /sysroot"

     Spoke should reboot successfully.