I don't know how much it'll help, but I have this running in the background to
try to see whatever causes it. It doesn't help much considering I don't have a
marker/way to input when the crash starts to happen, but maybe someone has an
idea of the best way to do that. Maybe look for messages in dmesg about the
rings locking up? Any improvement ideas? You probably will have to adjust the
sampling rate and size to fit your computer, my drive is at 50% usage running
this, but I can afford it since I have a few drives.

http://ideone.com/V4MkeN