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xen-users
Re: [Xen-users] ide cdrom access to domain1, domain2 etc.
On Thursday 20 October 2005 18:27, Utsav Agarwal wrote:
> I am running into the following problem in Xen 2.0 and would like to know
> if others see the same problem. Has this problem has been resolved yet
> (especially in Xen 3.0 or unstable tree):
> a) ide cdrom drive "/dev/hdc" cannot be exported to domain 1+. It can
> be exported, but it doesn't work i.e. cdrom is not detected.
It will be detected when a CD is in the drive the moment you boot your domU,
but changing the CD while domU is running will most likely screw up things.
Also, domU will only see a plain block device, so any CD specific actions on
it will fail (no eject, audio playback, ...)
> b) Can the cdrom drive be hidden from dom 0 and only domain 1 see it
> so that the above may work?
No, only PCI devices can be passed around in that way.
> c) What about usb cdrom's? Even after hiding the usb pci targets to
> dom0, I am unable to use the USB cdrom drive in domain 1 since domain 0
> somehow sees it. Has anyone seen this before? Has it been fixed yet?
Then you probably failed to hide ALL pci devices asociated with the USB
controller. USB2 HCIs come with several USB1.1 "companion controllers", you
have to hide them all from dom0 and export all of them to the domU.
/Ernst
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