If it happened in arch and happens now in crunchbang what's in common?
If you are using the same openbox config try using the default one.
I suspect it is hardware issues though, i/o or memory issues. How old is the hardware?
One thing is sure. There is no such problem inside #! or openbox, so it`s got to be due to faulthy hardware or custom scripts/changes in default scripts. Probably faulthy hardware, because I` m a linux newbie and nowhere as competent as the people who puzzle with Arch, and I get no crashes whatsoever. I haven``t had a single crash with #! and openbox.
- apt-mark hold account
You may want to do some comprehensive stability testing, as it could be something other than your hard drive. I'd run memtest (failure would mean RAM is bad), and if it passes, then I'd run prime95 (failure would mean other factors, likely CPU/mobo/power).
Registered Linux User #555399
crunchbox: Phenom II X6 1055T | 8GB RAM | OCZ Vertex 4 128GB | Radeon 7870XT | Win7 / #! 11 (i3 WM)
lambdacore: 4x Opteron 8431 | 16GB RAM | 2x1TB mirrored (ZFSoL) | Debian 7 (headless)
crunchtop: Acer Aspire 1410 11.6" | 2GB RAM | Crucial M4 128GB | #! 11 (i3 WM)