*Jerry Amundson* wrote on *Thu Mar 5 19:27:34 UTC 2009* >Otherwise, if you do not need Xen 3.2, just "yum groupinstall Virtualization". Thanks for your advice,i do "yum groupinstall Virtualization". Unfortuanately,when reboot,the system also halted at: ///////////////////////////////////////////////////////////////////////////// Red Hat nash version 5.1.19.6 usb 1-5: device not accepting address 4 ,error -110 usb 1-5: device not accepting address 5, error -110 usb 1-5: device not accepting address 6,error -110 usb 1-5: device not accepting address 7,error -110 //////////////////////////////////////////////////////////////////////////////// -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.centos.org/pipermail/centos-virt/attachments/20090306/e3ae4fbe/attachment-0006.html>