[CentOS] System hanged - no info in logs.

[Phil Schaffner]

Rafał Radecki wrote on 04/12/2012 03:07 AM:
> Hi All.
>
> I had today a problem with my mail server (2.6.18-274.12.1.el5 #1 SMP Tue
> Nov 29 13:37:35 EST 2011 i686 i686 i386 GNU/Linux, CentOS release 5.7
> (Final)). On my Cacti graphs I see that there has been much I/O write on
> the disks and then there is no more info. Also in logs (messages, dmesg,
> netconsole) there is no info for about 15 minutes when there was a problem
> with the server.
>
> I would like to have some info in such situations. Do you know any
> solutions?
>

Your description is unclear. Did the system recover, or did it have to 
be power cycled or otherwise rebooted?

A hang with no log information can sometimes be caused by driver issues.

The first thing to try is a "yum update" to the current and supported  
version 5.8.

Phil