Thank you and Mogens. and I also think this is the cause. Tang Jianwei On 07/06/2010 06:50 PM, Eero Volotinen wrote: > /dev/* is virtual directory containing all devices, not files. create > your swap on disk devices (/dev/sdXX, not in "empty space) > -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.centos.org/pipermail/centos/attachments/20100706/94af21af/attachment-0005.html>