Comment 6 for bug 1796292

Thank you for the config and an install log.

You don't happen to have a verbose curtin install log where it times out (the failure path)?

The error on rescanning partitions is a side-effect from one or more of the bcache devices
from not getting shut down properly which keeps a hold on the underlying device which prevents
access to the device exclusively, hence the error; however the failure is before this.

Getting the verbose logging from curtin (like you did for this successful install) will help me understand where the bug occurred.