<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> <html> <head> </head> <body bgcolor="#ffffff" text="#000000"> Hi I am using libvirt and virt-manager to manage and run 2 Fedora 10 guest operating systems for the sake of installing a Oracle RAC environment . As part of the process after using the both gues for some work i felt the nedd to add an additional virtual scsi disk to one of the hosts. Trying to start the guest os after adding this scsi virtual disk to the host fails (see image) . The guest BIOS screen and all comes up fine but it now seems to be trying to boot from the newly added disk . Fiddling around with the order of the disks as listed in the xml has not helped either . I even tried to invoke qemu-kvm directly as observed from ps at the time of a running guest and that seems to fail as well . 1)Manual Command that failed to start the qemu-image/usr/bin/qemu-kvm -S -M pc -m 1027 -smp 1 -name Ora1 -monitor pty -no-reboot -boot c -drive file=/dev/sda5,if=virtio,index=0,boot=on -drive file=/vd,if=scsi,index=0 -net nic,macaddr=54:52:00:36:72:92,vlan=0,model=virtio -net tap,fd=14,script=,vlan=0,ifname=vnet0 -serial pty -parallel none -usb -vnc 127.0.0.1:0 -k en-us Error on screen after this command TUNGETIFF ioctl() failed: Bad file descriptor bind() failed 2)<img alt="error on Guest bios at boot" src="cid:part1.05050708.01000109@gmail.com" height="167" width="300"> Please help <code></code> <code></code> </body> </html>