Hi, I got a few centos 5 boxes installed for tests and find the following confusing messages from ?dmesg? command: Your BIOS doesn't leave a aperture memory hole Memory: 4043392k/5242880k available (2397k kernel code, 150460k reserved, 1222k data, 196k init) The machine has only 4GB memory chips installed only, so where comes the number ?5242880k? for memory? [root at centos5Cli01 ~]# cat /proc/meminfo | grep -i total MemTotal: 4045132 kB HighTotal: 0 kB LowTotal: 4045132 kB SwapTotal: 15999252 kB VmallocTotal: 34359738367 kB HugePages_Total: 0 [root at centos5Cli01 ~]# ____________________________________________________________________________________ Fussy? Opinionated? Impossible to please? Perfect. Join Yahoo!'s user panel and lay it on us. http://surveylink.yahoo.com/gmrs/yahoo_panel_invite.asp?a=7