SCCM log location during task sequence
You can find the log of the task sequence on the following locations (is depending of the progress of the the task sequence):   Before hard drive is formatted and partitioned  X:\Windows\Temp\smstslog\smsts.log  After hard drive formatted  X:\smstslog\smsts.log  and then copied to  C:\_SMSTaskSequence\Logs\Smstslog\smsts.log  Before SCCM agent installed  C:\_SMSTaskSequence\Logs\Smstslog\smsts.log  After SCCM agent installed  %SystemRoot%\CCM\Logs\Smstslog\smsts.log  After the task sequence is complete  %SystemRoot%\CCM\Logs\smsts.log   Good luck with the task sequence! ;-)