I've setup a headless raspbian rpi using Hexxahs image and it's running of an external USB HDD with a memory split of 240/16. I've installed lighttpd, dokuwiki and samba. I've tried transfering 189 GB (1349 files; a mix of small (0-1 MB) and large (1-4 GB) files) from a Windows box to a smb share on the RPI. Only 28GB (152 files) was transferred then the RPI went unresponsive and I had to unplug the power to get it working again.
I used the following command to transfer the files: robocopy /S /E /XO /Z /TBD /FFT c:\src \\srv\dest\
How do I troubleshoot this issue? I*ve looked at logfiles in /var/log but none seems to be relevant. Which other logfiles should I look at?