The title of this one says it all really, but after spending hours scratching my head with a office file server I built for L.S.A. Ltd (www.travelf1.com) late last year I found the solution to the crashes that started occuring a couple of weeks ago.
See this Ubuntu Server Crash Output file – for the error message that was appearing basically it was a Kernel Oops that occurred when large files were being copied/transferred via samba. It turned out to one of the memory DIMMs going weird which I discovered after having the idea to run a Memtest on the machine (Memtest is available as a boot option when starting up a Ubuntu machine). At first I suspected the software RAID 1 but that’s actually been rock solid on this box and on my home Ubuntu server too.
