Troubleshooting OSD deployments can be frustrating. This degrades to downright impossible without logs to reference. Fortunately, we have the smsts.log to guide us. This log resides on the endpoint being built using your task sequence media. Depending on what stage your sequence is at when the failure occurs, the log file will be in one of the following locations (from -useful-sccm-osd-log-file-locations/):