On Fri, Mar 04, 2011 at 01:50:53PM +0000, Andy Bennett wrote:
> Your root partition is full and you don't appear to have a separate one
> for the spools.
>
> You may find that other things like mailboxes, logs and databases files
> have all been unexpectedly truncated. Free up some space, check
> everything carefully and be prepared to restore things from backups
> where daemons have gotten into a fix before writing out their in memory
> data.

And maybe also consider asking for a disk space nagios alert (will
require either allowing check by ssh, running nrpe or snmpd).

Cheers,
Andy