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. _______________________________________________ Xen-devel mailing list Xen-devel@lists.xensource.com http://lists.xensource.com/xen-devel
On 6/13/06, P M, Priya <pm.priya@hp.com> wrote:> > Hi, > > > 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. >This is just a guess, but you might try using the sda device instead. Last I used SCSI the Linux kernel squashed all SCSI id''s to the beginning. This means that even if you had 1 device marked with SCSI ID 3, it showed up as /dev/sda. You are presenting the kernel with a virtual SCSI device and it is likely presenting it as the first SCSI device available: /dev/sda while you are telling xen to mount /dev/sdb. Leeman _______________________________________________ Xen-users mailing list Xen-users@lists.xensource.com http://lists.xensource.com/xen-users
P M, Priya wrote:> 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. >ioemu:hdb is the syntax for FV devices. For FV, we only currently support exposing as IDE devices.> If we use > > disk = [ > ''file:/home/adteam/linux_fc5_2.6.16,ioemu:hda,w'',*''phy:/dev/sdd,/dev/sdb,w''* > ] >This is only valid syntax for PV domains.> /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??? >There is no support for SCSI emulator ATM. It is on the Roadmap though and it ought to have a pretty significant performance impact. It''s going to take a fair bit of time to realize that though. Regards, Anthony Liguori> Thanks. > > ------------------------------------------------------------------------ > > _______________________________________________ > Xen-devel mailing list > Xen-devel@lists.xensource.com > http://lists.xensource.com/xen-devel >_______________________________________________ Xen-devel mailing list Xen-devel@lists.xensource.com http://lists.xensource.com/xen-devel