This might help (hopefully) .... Get into your motherboard''s BIOS (e.g, <DEL>, <F1>, <F2> ...) as the system is coming up with the USB drive attached to the host and powered on. Look for a "Boot Priority" order type list. You will probably see the USB disk at the top of the list. Either decrease its priority (make CD-ROM / OS Hard Disk) the first choices and/or just remove the USB disk from the list altogether. Save your BIOS settings and reboot and see if that fixes the issue. The BIOS may think that the USB disk is bootable (MBR) and is trying (and probably failing) to find / boot an OS. Getting it lower on the list will insure that you regular OS disks (and possible recovery CD) do get booted first. Good Luck!! Rich -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.centos.org/pipermail/centos/attachments/20070131/8b70a6d7/attachment-0005.html>