Priya, HVM QEMU doesn’t support emulate SCSI device. So you have to use the IDE device. Your first configuration is correct. Best Regards, Yongkang (Kangkang) 永康 ________________________________ From: fedora-xen-bounces@redhat.com [mailto:fedora-xen-bounces@redhat.com] On Behalf Of P M, Priya Sent: 2006年6月14日 3:05 To: fedora-xen@redhat.com Subject: [Fedora-xen] Exporting "SD" device. Hi, We have Intel VT enabled system loaded with Xen 3.0.2 and qemu based FC5+linux 2.6.16 as a guest operating system. We want to export the disk to the domain 1 (FC5_linux 2.6.16) as "SD" device. But we are not able to export the SCSI disk as a SD device, we could export as a "HD" device. In the Configuration file, disk = [ ''file:/home/adteam/linux_fc5_2.6.16,ioemu:hda,w'',''phy:/dev/sdd,ioemu:hdb,w'' ] if we use ioemu:hdb, then the device is exported to the domain 1 and we could see the device. If we use disk = [ ''file:/home/adteam/linux_fc5_2.6.16,ioemu:hda,w'',''phy:/dev/sdd,/dev/sdb,w'' ] /dev/sdb, then the device is not seen on domain 1. Are we missing something. Is it not possible to export an SD device to domain 1? Is there any limitiation in qemu based domain 1, because our domain 0 is qemu based operating system. Is there any performance difference between "hda" and "sda" exported devices??? Thanks.