Hi Mindaugas > command line. To monitor e.g. if one of the HDDs failed. mpt-status from http://www.drugphish.ch/~ratz/mpt-status/ does exactly that. I'm currently testing it for our future SUN X4100 servers running CentOS 4 and it looks good. It reports failed/active disks and status of a RAID (e.g. good, rebuilding and so on). Kind regards, Roland