[no subject]

The /var looks a lot larger for a unmodified Qube2. Mine started out at about
4% and stays around that level. What has been added to the /var partition?

:>Hardware replacement looks like the only option, but to get a replacement
:>you must first "prove" that is a hardware problem.

Feels more like the root partition is running out of space?? Think about this
blue sky thought/guess  -- the root partition slowly fills (sending out an
email as it does so). Nothing is done, and it continues to grow. Finally it
runs out of space and hangs the system. A cold reboot is forced during which
some of the offending files are removed (maybe in /tmp?). Then the pattern
begins again. 

Maybe move /tmp to the home partition (/home/tmp and symbolic link /tmp to
it)?

OTH, it could be flaky ram or disk controller.

I will be real curious to know what you finally find.