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