[Xen-users] problem in xen guest

[Naveed Iqbal <naveed00786@xxxxxxxxxxx>]

How many xen guest can run parallel?we have Fedora core 8 host(dom0) and 9 Fedora caore 8 xen guest(domU) but only 8 guest run parallel when we try to run 9th guest then error comes which is

 return self.xd.domain_start(self.dom.getName(), paused)
  File "/usr/lib/python2.5/site-packages/xen/xend/XendDomain.py", line 999, in domain_start
    dominfo.waitForDevices()
  File "/usr/lib/python2.5/site-packages/xen/xend/XendDomainInfo.py", line 546, in waitForDevices
    self.getDeviceController(devclass).waitForDevices()
  File "/usr/lib/python2.5/site-packages/xen/xend/server/DevController.py", line 149, in waitForDevices
    return map(self.waitForDevice, self.deviceIDs())
  File "/usr/lib/python2.5/site-packages/xen/xend/server/DevController.py", line 174, in waitForDevice
    "%s" % (devid, self.deviceClass, err))
VmError: Device 51712 (vbd) could not be connected. Failed to find an unused loop device

so how many xen guest(domU) can run parallel?There is any limitations?
 
       

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